Dynamic approver from list with at least 100 project records

NINTEX Workflow/Form question:

Looking to create a workflow that can dynamically choose approver based on Project Manager column (as email or people field).

Here is list example:

Project Approver List

ID    ProjectName        ProjectManager
1     Project-1                Jon Doe
2     Project-2                Jane Doe
3     Project-3                Jim Bo
4     Project-4                Wendy Sue
..   ..        ..

Scenario:

If Project-3 is chosen by submitting user from Nintex form, the workflow would kick off and be sent to Jim Bo for approval.

Thanks in advance for helping.