Finding the Fourth Proportional to 4,155.52, 5,727.36 and 3,105.76

Step by Step Solution

1. Step 1: Write the proportion equation
   4,155.52 : 5,727.36 = 3,105.76 : x
2. Step 2: Convert to fraction form
   4,155.52/5,727.36 = 3,105.76/x
3. Step 3: Cross multiply
   4,155.52x = 5,727.36 × 3,105.76
4. Step 4: Simplify right side
   4,155.52x = 17,787,805.59
5. Step 5: Solve for x
   x = 17,787,805.59/4,155.52
6. Step 6: Final answer
   x = 4,280.52