Geodist between dataset and point

Hello,

I currently deal with a dataset containing the latitude and longitude for over 2000 locations. I need to find the distance between all these points and another given point, for which I also know the latitude and longitude. I know that I should use geodist, and I have tried to do it manually and it works, but I have no idea what code to use so I get all the distances in a new variable. Please help.