So some very quick context:

1) We have a module called 'Clients', with info on each registered client.

2) We have a 2nd module called 'Client Meetings', which holds info on meetings each sales rep has with a Client. 

First module has a 1-to-Many relationship with the second module (one client can have many meetings). 

Whenever a Sales Rep has a Client Meeting, they enter the "objective" of that meeting in the 'Client Meeting' module, and a workflow pulls in the most recent "objective" entered into that Client's page in the "Client" module. 

What I'm trying to do is to create another field in the 'Client Meeting' module called "Goal of previous meeting", that automatically fetches the record in the Client's page that contains info on their most recent objective. It's not clear how to go about doing this!