Finding the Fourth Proportional to 5,565.18, 8,339.42 and 5,155.10

Step by Step Solution

1. Step 1: Write the proportion equation
   5,565.18 : 8,339.42 = 5,155.10 : x
2. Step 2: Convert to fraction form
   5,565.18/8,339.42 = 5,155.10/x
3. Step 3: Cross multiply
   5,565.18x = 8,339.42 × 5,155.10
4. Step 4: Simplify right side
   5,565.18x = 42,990,544.04
5. Step 5: Solve for x
   x = 42,990,544.04/5,565.18
6. Step 6: Final answer
   x = 7,724.92