Load balancing a group of IIS, Apache Httpd, and Tomcat servers using only 1 NGINX server

Hi,

I am planning on deploying a couple of IIS, Tomcat and Apache web servers, each hosting different applications. Is it possible to load balance these servers which have different applications using only 1 NGINX server? The environment would be,
2 IIS servers with identical apps,
2 Tomcat servers with identical apps, and
2 Apache Httpd servers with identical apps.
The applications on the IIS, Tomcat and Apache servers are all different. I am wondering whether there is a way to load balance these servers using only one NGINX server.

I am new to NGINX, and only started reading about and it looks very interesting. If anyone out there can help me out with this, I would be very grateful.

Cheers,
Joe