Finding the Fourth Proportional to 11,255.12, 16,879.80 and 5,326.16

Step by Step Solution

1. Step 1: Write the proportion equation
   11,255.12 : 16,879.80 = 5,326.16 : x
2. Step 2: Convert to fraction form
   11,255.12/16,879.80 = 5,326.16/x
3. Step 3: Cross multiply
   11,255.12x = 16,879.80 × 5,326.16
4. Step 4: Simplify right side
   11,255.12x = 89,904,515.57
5. Step 5: Solve for x
   x = 89,904,515.57/11,255.12
6. Step 6: Final answer
   x = 7,987.88