Finding the Fourth Proportional to 8,904.78, 12,288.78 and 5,367.24

Step by Step Solution

1. Step 1: Write the proportion equation
   8,904.78 : 12,288.78 = 5,367.24 : x
2. Step 2: Convert to fraction form
   8,904.78/12,288.78 = 5,367.24/x
3. Step 3: Cross multiply
   8,904.78x = 12,288.78 × 5,367.24
4. Step 4: Simplify right side
   8,904.78x = 65,956,831.57
5. Step 5: Solve for x
   x = 65,956,831.57/8,904.78
6. Step 6: Final answer
   x = 7,406.90