Unity3D: Move the parent gameobject relative to the child

Question

So, I have X and Y game objects. I have a vector Z = X - Y which is indicated by the green line.

Also, I have a Parent game object and it has a Child game object. How do I move the parent such that the child game object is at the Point Y

I tried,

                  Z -= new Vector3(child.localPosition.x, 0, child.localPosition.z);
                  Parent.transform.position = Z

which is not working as expected. Thank you!

Answer 1

Did you try something like this?

childToTarget = targetPosition - child.position;
childToTarget.y = 0;

parent.position+= childToTarget;