Finding the Third Proportional to 31,650 and 67,390

Step by Step Solution

1. Step 1: Write the proportion equation
   31,650 : 67,390 = 67,390 : x
2. Step 2: Convert to fraction form
   31,650/67,390 = 67,390/x
3. Step 3: Cross multiply
   31,650x = 67,390 × 67,390
4. Step 4: Simplify right side
   31,650x = 4,541,412,100
5. Step 5: Solve for x
   x = 4,541,412,100/31,650
6. Step 6: Final answer
   x = 143,488.53