Finding the Fourth Proportional to 4,004.78, 5,528.42 and 2,855.69

Step by Step Solution

1. Step 1: Write the proportion equation
   4,004.78 : 5,528.42 = 2,855.69 : x
2. Step 2: Convert to fraction form
   4,004.78/5,528.42 = 2,855.69/x
3. Step 3: Cross multiply
   4,004.78x = 5,528.42 × 2,855.69
4. Step 4: Simplify right side
   4,004.78x = 15,787,443.23
5. Step 5: Solve for x
   x = 15,787,443.23/4,004.78
6. Step 6: Final answer
   x = 3,942.15