Finding the Fourth Proportional to 2,942.72, 4,413.60 and 994.64

Step by Step Solution

1. Step 1: Write the proportion equation
   2,942.72 : 4,413.60 = 994.64 : x
2. Step 2: Convert to fraction form
   2,942.72/4,413.60 = 994.64/x
3. Step 3: Cross multiply
   2,942.72x = 4,413.60 × 994.64
4. Step 4: Simplify right side
   2,942.72x = 4,389,943.10
5. Step 5: Solve for x
   x = 4,389,943.10/2,942.72
6. Step 6: Final answer
   x = 1,491.80