Hi,
I believe you have maintained the ownership details, like consolidation method (purchase, equity etc), the percentage of consolidation, etc. Once these are done. You have to go to Consolidation Central and select Consolidation monitor > on the right pane you should see the ownership hierarchy > select group to which you have added the new entity> adjust the context on the top for Category, Time and Scope (Group). Once all is set , you click Consolidate button.
Hope this helps.
Regards,
Kalyan.