Finding the Fourth Proportional to 11,002.20, 16,505.73 and 5,458.56

Step by Step Solution

1. Step 1: Write the proportion equation
   11,002.20 : 16,505.73 = 5,458.56 : x
2. Step 2: Convert to fraction form
   11,002.20/16,505.73 = 5,458.56/x
3. Step 3: Cross multiply
   11,002.20x = 16,505.73 × 5,458.56
4. Step 4: Simplify right side
   11,002.20x = 90,097,517.55
5. Step 5: Solve for x
   x = 90,097,517.55/11,002.20
6. Step 6: Final answer
   x = 8,189.05