The Tomcat version will be logged into the Foglight Management Server log which is located in "[FMS_HOME]/logs". The entry looks like this:
Starting Servlet engine: [Apache Tomcat/VERSION]
 
| Foglight version | Tomcat version | 
|---|---|
| 6.1.0 | 9.0.55 | 
| 6.3.0 | 9.0.74 | 
| 7.1.0 | 9.0.75 | 
| 7.1.5 | 9.0.89 | 
| 7.1.8 | 9.0.105 | 
| 7.3.0 | 9.0.93 | 
| 7.3.0.6 | 9.0.105 | 
| 8.0.0.1 | 9.0.107 |