Finding the Third Proportional to 87,491 and 131,570

Step by Step Solution

1. Step 1: Write the proportion equation
   87,491 : 131,570 = 131,570 : x
2. Step 2: Convert to fraction form
   87,491/131,570 = 131,570/x
3. Step 3: Cross multiply
   87,491x = 131,570 × 131,570
4. Step 4: Simplify right side
   87,491x = 17,310,664,900
5. Step 5: Solve for x
   x = 17,310,664,900/87,491
6. Step 6: Final answer
   x = 197,856.52