I've recently "inherited" a project which someone else never finished... It's basically a schools project that receives/transmits teacher's classes to other classes, connected on the same network.

Every classroom has a desktop machine, loaded with the software to receive/transmit, connected to 1x LCD monitor, 1x SmartBoard (interactive whiteboard) and now an LCD TV as well.

The LCD monitor and the SmartBoard are already connected and working, by means of a normal VGA splitter cable plugged in directly into the card.

I now need to extend the screen onto the LCD TV as well, meaning a 3-way split/extension.
Is it possible to extend the screen as per my requirement without getting completely new hardware?

I don't have much experience in this field and would appreciate any assistance.