Finding the Third Proportional to 131,499 and 287,604

Step by Step Solution

1. Step 1: Write the proportion equation
   131,499 : 287,604 = 287,604 : x
2. Step 2: Convert to fraction form
   131,499/287,604 = 287,604/x
3. Step 3: Cross multiply
   131,499x = 287,604 × 287,604
4. Step 4: Simplify right side
   131,499x = 82,716,060,816
5. Step 5: Solve for x
   x = 82,716,060,816/131,499
6. Step 6: Final answer
   x = 629,024.26