Finding the Third Proportional to 331,490,781.75 and 721,834,510.50

Step by Step Solution

1. Step 1: Write the proportion equation
   331,490,781.75 : 721,834,510.50 = 721,834,510.50 : x
2. Step 2: Convert to fraction form
   331,490,781.75/721,834,510.50 = 721,834,510.50/x
3. Step 3: Cross multiply
   331,490,781.75x = 721,834,510.50 × 721,834,510.50
4. Step 4: Simplify right side
   331,490,781.75x = 521,045,060,548,774,592
5. Step 5: Solve for x
   x = 521,045,060,548,774,592/331,490,781.75
6. Step 6: Final answer
   x = 1,571,823,680.28