Finding the Third Proportional to 31,457.25 and 68,451.75

Step by Step Solution

1. Step 1: Write the proportion equation
   31,457.25 : 68,451.75 = 68,451.75 : x
2. Step 2: Convert to fraction form
   31,457.25/68,451.75 = 68,451.75/x
3. Step 3: Cross multiply
   31,457.25x = 68,451.75 × 68,451.75
4. Step 4: Simplify right side
   31,457.25x = 4,685,642,078.06
5. Step 5: Solve for x
   x = 4,685,642,078.06/31,457.25
6. Step 6: Final answer
   x = 148,952.69