You need to configure the Reporting and Functional Currencies your org will support. The Reporting Currency is the currency your org uses for reporting purposes. Functional Currencies are the currencies your customers can select to transact with from your Community Portal.
You will configure currencies in three parts:
Manage Active Currencies in Salesforce
Configure Conversion Rates
Designate Reporting and Functional Currencies
Currencies need to be activated in Salesforce’s Active Currencies Table. Learn how in Manage Active Currencies (Salesforce).