Find the distances X and y beacon

Indoor Location
1

Hello
I’m doing indoor location Beacon. I found the beacon in the distance, but I can’t find the X and Y coordinates according to the distances. What should I do?

2

Here’s a tutorial just for you (:

http://developer.estimote.com/indoor/build-an-app/

3

I’m developing software for Android. How could it be done for Android?