Finding the Third Proportional to 131,122 and 287,516

Step by Step Solution

1. Step 1: Write the proportion equation
   131,122 : 287,516 = 287,516 : x
2. Step 2: Convert to fraction form
   131,122/287,516 = 287,516/x
3. Step 3: Cross multiply
   131,122x = 287,516 × 287,516
4. Step 4: Simplify right side
   131,122x = 82,665,450,256
5. Step 5: Solve for x
   x = 82,665,450,256/131,122
6. Step 6: Final answer
   x = 630,446.84