Finding the Fourth Proportional to 12,401.29, 17,126.10 and 8,155.09

Step by Step Solution

1. Step 1: Write the proportion equation
   12,401.29 : 17,126.10 = 8,155.09 : x
2. Step 2: Convert to fraction form
   12,401.29/17,126.10 = 8,155.09/x
3. Step 3: Cross multiply
   12,401.29x = 17,126.10 × 8,155.09
4. Step 4: Simplify right side
   12,401.29x = 139,664,886.85
5. Step 5: Solve for x
   x = 139,664,886.85/12,401.29
6. Step 6: Final answer
   x = 11,262.13