Finding the Fourth Proportional to 3,896.78, 5,853.33 and 3,311.69

Step by Step Solution

1. Step 1: Write the proportion equation
   3,896.78 : 5,853.33 = 3,311.69 : x
2. Step 2: Convert to fraction form
   3,896.78/5,853.33 = 3,311.69/x
3. Step 3: Cross multiply
   3,896.78x = 5,853.33 × 3,311.69
4. Step 4: Simplify right side
   3,896.78x = 19,384,385.16
5. Step 5: Solve for x
   x = 19,384,385.16/3,896.78
6. Step 6: Final answer
   x = 4,974.47