At work we are on a sub-network (192.x.x.x), but we'd like to get access to a SQL server on the main network (173.x.x.x)- can it be done?

At work, in our building, we are on a peer-to-peer 192.168.x.x network.

We gateway to the main network in a building near our building which is on a 173.44.x.x. We are connected physically to that network and get things link Internet access through it.

How would I go about getting the ability to access an SQL server sitting on the 173 network from my 192 network?