Finding the Third Proportional to 31,243.25 and 67,407.25

Step by Step Solution

1. Step 1: Write the proportion equation
   31,243.25 : 67,407.25 = 67,407.25 : x
2. Step 2: Convert to fraction form
   31,243.25/67,407.25 = 67,407.25/x
3. Step 3: Cross multiply
   31,243.25x = 67,407.25 × 67,407.25
4. Step 4: Simplify right side
   31,243.25x = 4,543,737,352.56
5. Step 5: Solve for x
   x = 4,543,737,352.56/31,243.25
6. Step 6: Final answer
   x = 145,431.01