Finding the Fourth Proportional to 8,665.87, 11,960.33 and 5,310.54

Step by Step Solution

1. Step 1: Write the proportion equation
   8,665.87 : 11,960.33 = 5,310.54 : x
2. Step 2: Convert to fraction form
   8,665.87/11,960.33 = 5,310.54/x
3. Step 3: Cross multiply
   8,665.87x = 11,960.33 × 5,310.54
4. Step 4: Simplify right side
   8,665.87x = 63,515,761.89
5. Step 5: Solve for x
   x = 63,515,761.89/8,665.87
6. Step 6: Final answer
   x = 7,329.41