Horizons How do I triangulate to find another system

[martinjh99]

given the messages in this album:

http://imgur.com/a/YQfab

How do I go about finding out where the triangulation is for the obvious target?

I have a feeling that what I'm looking for is not in any of the systems that are mentioned...

 

[RevLogos]

Each of the 3 listening posts gives a clue to the location in a system, and a distance to that system. Find the system that is the correct distance from all three. It helps to bookmark them.