Finding the Fourth Proportional to 8,857.90, 12,223.98 and 4,879.15

Step by Step Solution

1. Step 1: Write the proportion equation
   8,857.90 : 12,223.98 = 4,879.15 : x
2. Step 2: Convert to fraction form
   8,857.90/12,223.98 = 4,879.15/x
3. Step 3: Cross multiply
   8,857.90x = 12,223.98 × 4,879.15
4. Step 4: Simplify right side
   8,857.90x = 59,642,632.02
5. Step 5: Solve for x
   x = 59,642,632.02/8,857.90
6. Step 6: Final answer
   x = 6,733.27