Finding the Third Proportional to 131,411.74 and 287,700.61

Step by Step Solution

1. Step 1: Write the proportion equation
   131,411.74 : 287,700.61 = 287,700.61 : x
2. Step 2: Convert to fraction form
   131,411.74/287,700.61 = 287,700.61/x
3. Step 3: Cross multiply
   131,411.74x = 287,700.61 × 287,700.61
4. Step 4: Simplify right side
   131,411.74x = 82,771,640,634.75
5. Step 5: Solve for x
   x = 82,771,640,634.75/131,411.74
6. Step 6: Final answer
   x = 629,864.88