Finding the Fourth Proportional to 8,105.34, 11,187.49 and 5,280.47

Step by Step Solution

1. Step 1: Write the proportion equation
   8,105.34 : 11,187.49 = 5,280.47 : x
2. Step 2: Convert to fraction form
   8,105.34/11,187.49 = 5,280.47/x
3. Step 3: Cross multiply
   8,105.34x = 11,187.49 × 5,280.47
4. Step 4: Simplify right side
   8,105.34x = 59,075,205.32
5. Step 5: Solve for x
   x = 59,075,205.32/8,105.34
6. Step 6: Final answer
   x = 7,288.43