Finding the Third Proportional to 131,134.50 and 287,487

Step by Step Solution

1. Step 1: Write the proportion equation
   131,134.50 : 287,487 = 287,487 : x
2. Step 2: Convert to fraction form
   131,134.50/287,487 = 287,487/x
3. Step 3: Cross multiply
   131,134.50x = 287,487 × 287,487
4. Step 4: Simplify right side
   131,134.50x = 82,648,775,169
5. Step 5: Solve for x
   x = 82,648,775,169/131,134.50
6. Step 6: Final answer
   x = 630,259.58