Finding the Fourth Proportional to 3,963.15, 5,471.82 and 3,542.15

Step by Step Solution

1. Step 1: Write the proportion equation
   3,963.15 : 5,471.82 = 3,542.15 : x
2. Step 2: Convert to fraction form
   3,963.15/5,471.82 = 3,542.15/x
3. Step 3: Cross multiply
   3,963.15x = 5,471.82 × 3,542.15
4. Step 4: Simplify right side
   3,963.15x = 19,382,020.89
5. Step 5: Solve for x
   x = 19,382,020.89/3,963.15
6. Step 6: Final answer
   x = 4,890.56