Finding the Third Proportional to 31,411.55 and 67,743.56

Step by Step Solution

1. Step 1: Write the proportion equation
   31,411.55 : 67,743.56 = 67,743.56 : x
2. Step 2: Convert to fraction form
   31,411.55/67,743.56 = 67,743.56/x
3. Step 3: Cross multiply
   31,411.55x = 67,743.56 × 67,743.56
4. Step 4: Simplify right side
   31,411.55x = 4,589,190,260.19
5. Step 5: Solve for x
   x = 4,589,190,260.19/31,411.55
6. Step 6: Final answer
   x = 146,098.83