Finding the Fourth Proportional to 8,105.69, 11,187.95 and 5,280.11

Step by Step Solution

1. Step 1: Write the proportion equation
   8,105.69 : 11,187.95 = 5,280.11 : x
2. Step 2: Convert to fraction form
   8,105.69/11,187.95 = 5,280.11/x
3. Step 3: Cross multiply
   8,105.69x = 11,187.95 × 5,280.11
4. Step 4: Simplify right side
   8,105.69x = 59,073,606.67
5. Step 5: Solve for x
   x = 59,073,606.67/8,105.69
6. Step 6: Final answer
   x = 7,287.92