Finding the Fourth Proportional to 3,413.52, 5,115.96 and 1,872.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,413.52 : 5,115.96 = 1,872.72 : x
2. Step 2: Convert to fraction form
   3,413.52/5,115.96 = 1,872.72/x
3. Step 3: Cross multiply
   3,413.52x = 5,115.96 × 1,872.72
4. Step 4: Simplify right side
   3,413.52x = 9,580,760.61
5. Step 5: Solve for x
   x = 9,580,760.61/3,413.52
6. Step 6: Final answer
   x = 2,806.71