As long as the parameter names are the same in all Notebooks, whatever value you trigger the workflow with will automatically be sent to all the notebooks. 

For example, if all three notebooks in the workflow have parameters entity-1 and entity-2, and you trigger the workflow externally (like via Airflow) with the dynamic parameter value for each, it should just be sent to all the notebooks accordingly. These become "job parameters" which are then passed down to all tasks.

https://docs.databricks.com/en/jobs/create-run-jobs.html#pass-parameters-to-a-databricks-job-task

Now, if you need Notebook 1 to set a parameter for Notebook 2, that is a different solution.