Finding the Fourth Proportional to 3,498.52, 5,249.88 and 3,139.96

Step by Step Solution

1. Step 1: Write the proportion equation
   3,498.52 : 5,249.88 = 3,139.96 : x
2. Step 2: Convert to fraction form
   3,498.52/5,249.88 = 3,139.96/x
3. Step 3: Cross multiply
   3,498.52x = 5,249.88 × 3,139.96
4. Step 4: Simplify right side
   3,498.52x = 16,484,413.20
5. Step 5: Solve for x
   x = 16,484,413.20/3,498.52
6. Step 6: Final answer
   x = 4,711.82