Finding the Fourth Proportional to 3,413.82, 4,710.96 and 2,155.55

Step by Step Solution

1. Step 1: Write the proportion equation
   3,413.82 : 4,710.96 = 2,155.55 : x
2. Step 2: Convert to fraction form
   3,413.82/4,710.96 = 2,155.55/x
3. Step 3: Cross multiply
   3,413.82x = 4,710.96 × 2,155.55
4. Step 4: Simplify right side
   3,413.82x = 10,154,686.27
5. Step 5: Solve for x
   x = 10,154,686.27/3,413.82
6. Step 6: Final answer
   x = 2,974.58