Finding the Third Proportional to 12,139.88 and 16,401.23

Step by Step Solution

1. Step 1: Write the proportion equation
   12,139.88 : 16,401.23 = 16,401.23 : x
2. Step 2: Convert to fraction form
   12,139.88/16,401.23 = 16,401.23/x
3. Step 3: Cross multiply
   12,139.88x = 16,401.23 × 16,401.23
4. Step 4: Simplify right side
   12,139.88x = 269,000,489.02
5. Step 5: Solve for x
   x = 269,000,489.02/12,139.88
6. Step 6: Final answer
   x = 22,158.42