Finding the Fourth Proportional to 8,109.41, 11,185.64 and 5,591.61

Step by Step Solution

1. Step 1: Write the proportion equation
   8,109.41 : 11,185.64 = 5,591.61 : x
2. Step 2: Convert to fraction form
   8,109.41/11,185.64 = 5,591.61/x
3. Step 3: Cross multiply
   8,109.41x = 11,185.64 × 5,591.61
4. Step 4: Simplify right side
   8,109.41x = 62,545,708.52
5. Step 5: Solve for x
   x = 62,545,708.52/8,109.41
6. Step 6: Final answer
   x = 7,712.74