Finding the Third Proportional to 31,458.38 and 68,748.75

Step by Step Solution

1. Step 1: Write the proportion equation
   31,458.38 : 68,748.75 = 68,748.75 : x
2. Step 2: Convert to fraction form
   31,458.38/68,748.75 = 68,748.75/x
3. Step 3: Cross multiply
   31,458.38x = 68,748.75 × 68,748.75
4. Step 4: Simplify right side
   31,458.38x = 4,726,390,626.56
5. Step 5: Solve for x
   x = 4,726,390,626.56/31,458.38
6. Step 6: Final answer
   x = 150,242.68