Finding the Fourth Proportional to 2,942.56, 4,413.06 and 862.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,942.56 : 4,413.06 = 862.72 : x
2. Step 2: Convert to fraction form
   2,942.56/4,413.06 = 862.72/x
3. Step 3: Cross multiply
   2,942.56x = 4,413.06 × 862.72
4. Step 4: Simplify right side
   2,942.56x = 3,807,235.12
5. Step 5: Solve for x
   x = 3,807,235.12/2,942.56
6. Step 6: Final answer
   x = 1,293.85