Finding the Third Proportional to 31,407.75 and 67,174.31

Step by Step Solution

1. Step 1: Write the proportion equation
   31,407.75 : 67,174.31 = 67,174.31 : x
2. Step 2: Convert to fraction form
   31,407.75/67,174.31 = 67,174.31/x
3. Step 3: Cross multiply
   31,407.75x = 67,174.31 × 67,174.31
4. Step 4: Simplify right side
   31,407.75x = 4,512,388,259.85
5. Step 5: Solve for x
   x = 4,512,388,259.85/31,407.75
6. Step 6: Final answer
   x = 143,671.17