Locating an object position by 3 spatially separated radars with each only giving the distance to the object in the sky

Question

Solving for the radar detected object from the 3 distances to 3 spatially separated Radar emitters/receivers. Let say first is positioned at the reference point: x1=0,y1=0,z1=0, next at x2,y2,z2 and the third at x2,y3, z3. Lets call the distances R1, R2 and R3 from each location. There should be a unique answer, ie a vector pointing to the object detected

I have looked thru some of the problems and non addresses this question. I only run Matlab