Finding the Third Proportional to 31,387 and 68,996

Step by Step Solution

1. Step 1: Write the proportion equation
   31,387 : 68,996 = 68,996 : x
2. Step 2: Convert to fraction form
   31,387/68,996 = 68,996/x
3. Step 3: Cross multiply
   31,387x = 68,996 × 68,996
4. Step 4: Simplify right side
   31,387x = 4,760,448,016
5. Step 5: Solve for x
   x = 4,760,448,016/31,387
6. Step 6: Final answer
   x = 151,669.42