Finding the Third Proportional to 644,813,410 and 1,399,103,663

Step by Step Solution

1. Step 1: Write the proportion equation
   644,813,410 : 1,399,103,663 = 1,399,103,663 : x
2. Step 2: Convert to fraction form
   644,813,410/1,399,103,663 = 1,399,103,663/x
3. Step 3: Cross multiply
   644,813,410x = 1,399,103,663 × 1,399,103,663
4. Step 4: Simplify right side
   644,813,410x = 1,957,491,059,820,017,664
5. Step 5: Solve for x
   x = 1,957,491,059,820,017,664/644,813,410
6. Step 6: Final answer
   x = 3,035,748,062.09