Finding the Third Proportional to 131,479 and 287,836

Step by Step Solution

1. Step 1: Write the proportion equation
   131,479 : 287,836 = 287,836 : x
2. Step 2: Convert to fraction form
   131,479/287,836 = 287,836/x
3. Step 3: Cross multiply
   131,479x = 287,836 × 287,836
4. Step 4: Simplify right side
   131,479x = 82,849,562,896
5. Step 5: Solve for x
   x = 82,849,562,896/131,479
6. Step 6: Final answer
   x = 630,135.33