Her friend Phu Tran was found yesterday by pastoralist Ted Fogarty and partner Tamra McBeath-Riley was found on Sunday.
Claire Hockridge, 46, grew to become stranded with two pals south of Alice Springs on November 19, when their ute grew to become bogged in sand on a river mattress. He was taken to a hospital where he was treated for exposure.
Ms McBeath-Riley said she was "worried to death" about her two friends who had meant to go towards the Stuart Highway, about 22 kilometres from where they separated.
McBeath-Riley, who had been driving and became lost, decided on Thursday to stay at a salty waterhole with the couple's Staffordshire terrier while her companions attempted to trek toward a highway, carrying water and planning to walk at night to avoid the desert heat, which came close to 40 degrees Celsius (104 Fahrenheit) in recent days.
"During the day it's just really hot so we dug ourselves under the auto during the day into the sand. At night [we] could sleep in the auto".
She instructed public broadcaster ABC that the trio- accompanied by their blue Staffordshire terrier Raya- had survived by drinking pre-blended vodka drinks and water from a hole dug for cattle, drinking biscuits and sheltering in a hole dug under her auto.
The group eventually chose to split up to get help.
Hockridge was last seen by Tran at the Palmer Valley Station fence line two days ago, police said earlier on Wednesday.
The discovery of Mr Tran had narrowed the rugged area being looking at by searchers in helicopters, Ms Vicary said earlier. They spotted Ms McBeath-Riley on Sunday, about 1.5km (0.9 miles) away from the auto.
Mr Tran was discovered about 12km from the vehicle, two days after he and Ms Hockridge had separated after finding the station's fence.
"He said he was coming with me", Mr Fogarty told The Australian newspaper.
Superintendent Vicary said authorities were still determining the circumstances that led to the separation of Ms Hockridge and Mr Tran.