Finding the Third Proportional to 31,609.70 and 67,717.27

Step by Step Solution

1. Step 1: Write the proportion equation
   31,609.70 : 67,717.27 = 67,717.27 : x
2. Step 2: Convert to fraction form
   31,609.70/67,717.27 = 67,717.27/x
3. Step 3: Cross multiply
   31,609.70x = 67,717.27 × 67,717.27
4. Step 4: Simplify right side
   31,609.70x = 4,585,628,063.73
5. Step 5: Solve for x
   x = 4,585,628,063.73/31,609.70
6. Step 6: Final answer
   x = 145,070.30