Finding the Fourth Proportional to 3,942.15, 5,913.15 and 1,863.15

Step by Step Solution

1. Step 1: Write the proportion equation
   3,942.15 : 5,913.15 = 1,863.15 : x
2. Step 2: Convert to fraction form
   3,942.15/5,913.15 = 1,863.15/x
3. Step 3: Cross multiply
   3,942.15x = 5,913.15 × 1,863.15
4. Step 4: Simplify right side
   3,942.15x = 11,017,085.42
5. Step 5: Solve for x
   x = 11,017,085.42/3,942.15
6. Step 6: Final answer
   x = 2,794.69