Finding the Third Proportional to 131,508 and 287,616

Step by Step Solution

1. Step 1: Write the proportion equation
   131,508 : 287,616 = 287,616 : x
2. Step 2: Convert to fraction form
   131,508/287,616 = 287,616/x
3. Step 3: Cross multiply
   131,508x = 287,616 × 287,616
4. Step 4: Simplify right side
   131,508x = 82,722,963,456
5. Step 5: Solve for x
   x = 82,722,963,456/131,508
6. Step 6: Final answer
   x = 629,033.70