Finding the Third Proportional to 12,231 and 16,398

Step by Step Solution

1. Step 1: Write the proportion equation
   12,231 : 16,398 = 16,398 : x
2. Step 2: Convert to fraction form
   12,231/16,398 = 16,398/x
3. Step 3: Cross multiply
   12,231x = 16,398 × 16,398
4. Step 4: Simplify right side
   12,231x = 268,894,404
5. Step 5: Solve for x
   x = 268,894,404/12,231
6. Step 6: Final answer
   x = 21,984.66