Finding the Third Proportional to 31,251.75 and 68,438.25

Step by Step Solution

1. Step 1: Write the proportion equation
   31,251.75 : 68,438.25 = 68,438.25 : x
2. Step 2: Convert to fraction form
   31,251.75/68,438.25 = 68,438.25/x
3. Step 3: Cross multiply
   31,251.75x = 68,438.25 × 68,438.25
4. Step 4: Simplify right side
   31,251.75x = 4,683,794,063.06
5. Step 5: Solve for x
   x = 4,683,794,063.06/31,251.75
6. Step 6: Final answer
   x = 149,873.02