Finding the Third Proportional to 31,390.50 and 67,760.25

Step by Step Solution

1. Step 1: Write the proportion equation
   31,390.50 : 67,760.25 = 67,760.25 : x
2. Step 2: Convert to fraction form
   31,390.50/67,760.25 = 67,760.25/x
3. Step 3: Cross multiply
   31,390.50x = 67,760.25 × 67,760.25
4. Step 4: Simplify right side
   31,390.50x = 4,591,451,480.06
5. Step 5: Solve for x
   x = 4,591,451,480.06/31,390.50
6. Step 6: Final answer
   x = 146,268.82