Finding the Third Proportional to 309,663 and 452,545.31

Step by Step Solution

1. Step 1: Write the proportion equation
   309,663 : 452,545.31 = 452,545.31 : x
2. Step 2: Convert to fraction form
   309,663/452,545.31 = 452,545.31/x
3. Step 3: Cross multiply
   309,663x = 452,545.31 × 452,545.31
4. Step 4: Simplify right side
   309,663x = 204,797,259,865.72
5. Step 5: Solve for x
   x = 204,797,259,865.72/309,663
6. Step 6: Final answer
   x = 661,355.28