Finding the Third Proportional to 30,689.25 and 67,233.75

Step by Step Solution

1. Step 1: Write the proportion equation
   30,689.25 : 67,233.75 = 67,233.75 : x
2. Step 2: Convert to fraction form
   30,689.25/67,233.75 = 67,233.75/x
3. Step 3: Cross multiply
   30,689.25x = 67,233.75 × 67,233.75
4. Step 4: Simplify right side
   30,689.25x = 4,520,377,139.06
5. Step 5: Solve for x
   x = 4,520,377,139.06/30,689.25
6. Step 6: Final answer
   x = 147,295.13