Finding the Third Proportional to 31,451.75 and 68,735.50

Step by Step Solution

1. Step 1: Write the proportion equation
   31,451.75 : 68,735.50 = 68,735.50 : x
2. Step 2: Convert to fraction form
   31,451.75/68,735.50 = 68,735.50/x
3. Step 3: Cross multiply
   31,451.75x = 68,735.50 × 68,735.50
4. Step 4: Simplify right side
   31,451.75x = 4,724,568,960.25
5. Step 5: Solve for x
   x = 4,724,568,960.25/31,451.75
6. Step 6: Final answer
   x = 150,216.41