Finding the Fourth Proportional to 3,923.78, 5,413.86 and 2,222.33

Step by Step Solution

1. Step 1: Write the proportion equation
   3,923.78 : 5,413.86 = 2,222.33 : x
2. Step 2: Convert to fraction form
   3,923.78/5,413.86 = 2,222.33/x
3. Step 3: Cross multiply
   3,923.78x = 5,413.86 × 2,222.33
4. Step 4: Simplify right side
   3,923.78x = 12,031,356.42
5. Step 5: Solve for x
   x = 12,031,356.42/3,923.78
6. Step 6: Final answer
   x = 3,066.27