Finding the Third Proportional to 131,471.25 and 287,819.25

Step by Step Solution

1. Step 1: Write the proportion equation
   131,471.25 : 287,819.25 = 287,819.25 : x
2. Step 2: Convert to fraction form
   131,471.25/287,819.25 = 287,819.25/x
3. Step 3: Cross multiply
   131,471.25x = 287,819.25 × 287,819.25
4. Step 4: Simplify right side
   131,471.25x = 82,839,920,670.56
5. Step 5: Solve for x
   x = 82,839,920,670.56/131,471.25
6. Step 6: Final answer
   x = 630,099.13