Finding the Fourth Proportional to 12,879.24, 17,767.07 and 8,105.10

Step by Step Solution

1. Step 1: Write the proportion equation
   12,879.24 : 17,767.07 = 8,105.10 : x
2. Step 2: Convert to fraction form
   12,879.24/17,767.07 = 8,105.10/x
3. Step 3: Cross multiply
   12,879.24x = 17,767.07 × 8,105.10
4. Step 4: Simplify right side
   12,879.24x = 144,003,749.70
5. Step 5: Solve for x
   x = 144,003,749.70/12,879.24
6. Step 6: Final answer
   x = 11,181.08