Finding the Fourth Proportional to 8,091.77, 11,168.31 and 5,105.61

Step by Step Solution

1. Step 1: Write the proportion equation
   8,091.77 : 11,168.31 = 5,105.61 : x
2. Step 2: Convert to fraction form
   8,091.77/11,168.31 = 5,105.61/x
3. Step 3: Cross multiply
   8,091.77x = 11,168.31 × 5,105.61
4. Step 4: Simplify right side
   8,091.77x = 57,021,035.22
5. Step 5: Solve for x
   x = 57,021,035.22/8,091.77
6. Step 6: Final answer
   x = 7,046.79