Finding the Fourth Proportional to 11,208.59, 16,815.29 and 5,589.31

Step by Step Solution

1. Step 1: Write the proportion equation
   11,208.59 : 16,815.29 = 5,589.31 : x
2. Step 2: Convert to fraction form
   11,208.59/16,815.29 = 5,589.31/x
3. Step 3: Cross multiply
   11,208.59x = 16,815.29 × 5,589.31
4. Step 4: Simplify right side
   11,208.59x = 93,985,868.55
5. Step 5: Solve for x
   x = 93,985,868.55/11,208.59
6. Step 6: Final answer
   x = 8,385.16