Finding the Third Proportional to 31,912.88 and 67,861.13

Step by Step Solution

1. Step 1: Write the proportion equation
   31,912.88 : 67,861.13 = 67,861.13 : x
2. Step 2: Convert to fraction form
   31,912.88/67,861.13 = 67,861.13/x
3. Step 3: Cross multiply
   31,912.88x = 67,861.13 × 67,861.13
4. Step 4: Simplify right side
   31,912.88x = 4,605,132,286.27
5. Step 5: Solve for x
   x = 4,605,132,286.27/31,912.88
6. Step 6: Final answer
   x = 144,303.27