Finding the Third Proportional to 148,980,806 and 320,730,522.50

Step by Step Solution

1. Step 1: Write the proportion equation
   148,980,806 : 320,730,522.50 = 320,730,522.50 : x
2. Step 2: Convert to fraction form
   148,980,806/320,730,522.50 = 320,730,522.50/x
3. Step 3: Cross multiply
   148,980,806x = 320,730,522.50 × 320,730,522.50
4. Step 4: Simplify right side
   148,980,806x = 102,868,068,063,123,008
5. Step 5: Solve for x
   x = 102,868,068,063,123,008/148,980,806
6. Step 6: Final answer
   x = 690,478,665.17