Finding the Fourth Proportional to 8,806.22, 13,200.42 and 5,521.61

Step by Step Solution

1. Step 1: Write the proportion equation
   8,806.22 : 13,200.42 = 5,521.61 : x
2. Step 2: Convert to fraction form
   8,806.22/13,200.42 = 5,521.61/x
3. Step 3: Cross multiply
   8,806.22x = 13,200.42 × 5,521.61
4. Step 4: Simplify right side
   8,806.22x = 72,887,505.07
5. Step 5: Solve for x
   x = 72,887,505.07/8,806.22
6. Step 6: Final answer
   x = 8,276.83