Finding the Third Proportional to 31,726.13 and 68,919.75

Step by Step Solution

1. Step 1: Write the proportion equation
   31,726.13 : 68,919.75 = 68,919.75 : x
2. Step 2: Convert to fraction form
   31,726.13/68,919.75 = 68,919.75/x
3. Step 3: Cross multiply
   31,726.13x = 68,919.75 × 68,919.75
4. Step 4: Simplify right side
   31,726.13x = 4,749,931,940.06
5. Step 5: Solve for x
   x = 4,749,931,940.06/31,726.13
6. Step 6: Final answer
   x = 149,716.74