Finding the Third Proportional to 131,494 and 287,540

Step by Step Solution

1. Step 1: Write the proportion equation
   131,494 : 287,540 = 287,540 : x
2. Step 2: Convert to fraction form
   131,494/287,540 = 287,540/x
3. Step 3: Cross multiply
   131,494x = 287,540 × 287,540
4. Step 4: Simplify right side
   131,494x = 82,679,251,600
5. Step 5: Solve for x
   x = 82,679,251,600/131,494
6. Step 6: Final answer
   x = 628,768.24