Finding the Third Proportional to 8,401.13 and 12,409.69

Step by Step Solution

1. Step 1: Write the proportion equation
   8,401.13 : 12,409.69 = 12,409.69 : x
2. Step 2: Convert to fraction form
   8,401.13/12,409.69 = 12,409.69/x
3. Step 3: Cross multiply
   8,401.13x = 12,409.69 × 12,409.69
4. Step 4: Simplify right side
   8,401.13x = 154,000,343.85
5. Step 5: Solve for x
   x = 154,000,343.85/8,401.13
6. Step 6: Final answer
   x = 18,330.92