Finding the Third Proportional to 431,593.50 and 653,386

Step by Step Solution

1. Step 1: Write the proportion equation
   431,593.50 : 653,386 = 653,386 : x
2. Step 2: Convert to fraction form
   431,593.50/653,386 = 653,386/x
3. Step 3: Cross multiply
   431,593.50x = 653,386 × 653,386
4. Step 4: Simplify right side
   431,593.50x = 426,913,264,996
5. Step 5: Solve for x
   x = 426,913,264,996/431,593.50
6. Step 6: Final answer
   x = 989,155.92