Inserting Vlookup function in all workbooks

I have around 700 workbooks in a folder on my PC.

My master file(master database.xlsx) is kept open from which i have to Vlookup the values into these 700 workbooks.

The "agent Id" column is common in both the master database.xlsx as well as those other workbooks also.

The thing i want to do is i need the data from the "reporting supervisor" which is in the master database.xlsx file to be available in the G column of the other 700 books ( i have attached only 4 sample books). The G column can be then named as "Reporting Supervisor". Since "Agent ID" is available in both files we can vlookup taking this as a base. I have attached the 4 sample files out of 700 as well as the master database file in a zip file.

Hope my question is clear to you. Please give a nice solution to this or else i have to open all the 700 files and do vlookup one by one.