Step 1: Find total female employees in companies B and F:
Female employees in B = 1860
Female employees in F = 1240
Total female employees = \(1860 + 1240 = 3100\)
Step 2: Find total employees in company D:
Total employees in D = 2500
Step 3: Calculate the required percentage:
\[
\frac{\text{Total female in B and F}}{\text{Total employees in D}} \times 100 = \frac{3100}{2500} \times 100 = 124%
\]
Thus, the total female employees in B and F together is \(\boxed{124%}\) of the total employees in D.