Finding the Third Proportional to 31,272 and 67,472

Step by Step Solution

1. Step 1: Write the proportion equation
   31,272 : 67,472 = 67,472 : x
2. Step 2: Convert to fraction form
   31,272/67,472 = 67,472/x
3. Step 3: Cross multiply
   31,272x = 67,472 × 67,472
4. Step 4: Simplify right side
   31,272x = 4,552,470,784
5. Step 5: Solve for x
   x = 4,552,470,784/31,272
6. Step 6: Final answer
   x = 145,576.58