Hi Mohit,
In my opinion, for the main bank account, you should do FC reveluation it'sbalance. (choose tab Balance of tcode FAGL_FC_VAL)
For the clearing accounts, if this account is set Open item in master data already, you should do FC Open item for it. (choose tab Open Items of tcode FAGL__FC_VAL)
For you reference, please take a look SAP help at:
https://help.sap.com/saphelp_erp2004/helpdata/en/a6/004940f0030272e10000000a155106/content.htm
Regards,
Julie