Finding the Third Proportional to 31,120.13 and 68,287.25

Step by Step Solution

1. Step 1: Write the proportion equation
   31,120.13 : 68,287.25 = 68,287.25 : x
2. Step 2: Convert to fraction form
   31,120.13/68,287.25 = 68,287.25/x
3. Step 3: Cross multiply
   31,120.13x = 68,287.25 × 68,287.25
4. Step 4: Simplify right side
   31,120.13x = 4,663,148,512.56
5. Step 5: Solve for x
   x = 4,663,148,512.56/31,120.13
6. Step 6: Final answer
   x = 149,843.50