Calculate x, y and z from lat, long and azimuth

Question

There is a way to calculate a vector 3 (x, y, z) given:

1. My position, in latitude and longitude;
2. The position of a place, in latitude and longitude;
3. Azimuth

In my case, once I have calculated the angle between my position and the position of the place, bearing in mind the azimuth value, how do I get the points x, y and z?

I ask for an app that uses augmented reality; through the camera I have to be able to always see the marker of the desired place in the same place, even changing the azimuth value.