Finding the Third Proportional to 131,513 and 287,635

Step by Step Solution

1. Step 1: Write the proportion equation
   131,513 : 287,635 = 287,635 : x
2. Step 2: Convert to fraction form
   131,513/287,635 = 287,635/x
3. Step 3: Cross multiply
   131,513x = 287,635 × 287,635
4. Step 4: Simplify right side
   131,513x = 82,733,893,225
5. Step 5: Solve for x
   x = 82,733,893,225/131,513
6. Step 6: Final answer
   x = 629,092.89