Finding the Fourth Proportional to 3,989.08, 5,498.61 and 3,148.42

Step by Step Solution

1. Step 1: Write the proportion equation
   3,989.08 : 5,498.61 = 3,148.42 : x
2. Step 2: Convert to fraction form
   3,989.08/5,498.61 = 3,148.42/x
3. Step 3: Cross multiply
   3,989.08x = 5,498.61 × 3,148.42
4. Step 4: Simplify right side
   3,989.08x = 17,311,933.70
5. Step 5: Solve for x
   x = 17,311,933.70/3,989.08
6. Step 6: Final answer
   x = 4,339.83