Finding the Third Proportional to 12,156 and 17,418

Step by Step Solution

1. Step 1: Write the proportion equation
   12,156 : 17,418 = 17,418 : x
2. Step 2: Convert to fraction form
   12,156/17,418 = 17,418/x
3. Step 3: Cross multiply
   12,156x = 17,418 × 17,418
4. Step 4: Simplify right side
   12,156x = 303,386,724
5. Step 5: Solve for x
   x = 303,386,724/12,156
6. Step 6: Final answer
   x = 24,957.78