Finding the Fourth Proportional to 3,947.18, 5,442.27 and 3,198.38

Step by Step Solution

1. Step 1: Write the proportion equation
   3,947.18 : 5,442.27 = 3,198.38 : x
2. Step 2: Convert to fraction form
   3,947.18/5,442.27 = 3,198.38/x
3. Step 3: Cross multiply
   3,947.18x = 5,442.27 × 3,198.38
4. Step 4: Simplify right side
   3,947.18x = 17,406,447.52
5. Step 5: Solve for x
   x = 17,406,447.52/3,947.18
6. Step 6: Final answer
   x = 4,409.84