Finding the Fourth Proportional to 3,926.33, 5,413.78 and 2,979.77

Step by Step Solution

1. Step 1: Write the proportion equation
   3,926.33 : 5,413.78 = 2,979.77 : x
2. Step 2: Convert to fraction form
   3,926.33/5,413.78 = 2,979.77/x
3. Step 3: Cross multiply
   3,926.33x = 5,413.78 × 2,979.77
4. Step 4: Simplify right side
   3,926.33x = 16,131,795.89
5. Step 5: Solve for x
   x = 16,131,795.89/3,926.33
6. Step 6: Final answer
   x = 4,108.62