Finding the Fourth Proportional to 9,288.82, 12,819.24 and 5,311.18

Step by Step Solution

1. Step 1: Write the proportion equation
   9,288.82 : 12,819.24 = 5,311.18 : x
2. Step 2: Convert to fraction form
   9,288.82/12,819.24 = 5,311.18/x
3. Step 3: Cross multiply
   9,288.82x = 12,819.24 × 5,311.18
4. Step 4: Simplify right side
   9,288.82x = 68,085,291.10
5. Step 5: Solve for x
   x = 68,085,291.10/9,288.82
6. Step 6: Final answer
   x = 7,329.81