Finding the Third Proportional to 131,118 and 287,508

Step by Step Solution

1. Step 1: Write the proportion equation
   131,118 : 287,508 = 287,508 : x
2. Step 2: Convert to fraction form
   131,118/287,508 = 287,508/x
3. Step 3: Cross multiply
   131,118x = 287,508 × 287,508
4. Step 4: Simplify right side
   131,118x = 82,660,850,064
5. Step 5: Solve for x
   x = 82,660,850,064/131,118
6. Step 6: Final answer
   x = 630,430.99