Finding the Fourth Proportional to 8,976.48, 12,388.80 and 5,440.86

Step by Step Solution

1. Step 1: Write the proportion equation
   8,976.48 : 12,388.80 = 5,440.86 : x
2. Step 2: Convert to fraction form
   8,976.48/12,388.80 = 5,440.86/x
3. Step 3: Cross multiply
   8,976.48x = 12,388.80 × 5,440.86
4. Step 4: Simplify right side
   8,976.48x = 67,405,726.37
5. Step 5: Solve for x
   x = 67,405,726.37/8,976.48
6. Step 6: Final answer
   x = 7,509.15