Finding the Fourth Proportional to 8,399.10, 11,591.88 and 5,423.59

Step by Step Solution

1. Step 1: Write the proportion equation
   8,399.10 : 11,591.88 = 5,423.59 : x
2. Step 2: Convert to fraction form
   8,399.10/11,591.88 = 5,423.59/x
3. Step 3: Cross multiply
   8,399.10x = 11,591.88 × 5,423.59
4. Step 4: Simplify right side
   8,399.10x = 62,869,604.45
5. Step 5: Solve for x
   x = 62,869,604.45/8,399.10
6. Step 6: Final answer
   x = 7,485.28