Finding the Third Proportional to 131,814 and 287,685

Step by Step Solution

1. Step 1: Write the proportion equation
   131,814 : 287,685 = 287,685 : x
2. Step 2: Convert to fraction form
   131,814/287,685 = 287,685/x
3. Step 3: Cross multiply
   131,814x = 287,685 × 287,685
4. Step 4: Simplify right side
   131,814x = 82,762,659,225
5. Step 5: Solve for x
   x = 82,762,659,225/131,814
6. Step 6: Final answer
   x = 627,874.57