I assume these are 2 different reports. There are several options, including:
1. grab the value in the 2nd report via a conditional total, SQL expression, or shared variable from a subreport (with similar logic as the 1st report)
2. Write the value in the first report to an ini or registry entry (via a Crystal Report UFL) and in the 2nd report read the value from the ini or registry entry (via the same UFL).