Finding the Fourth Proportional to 2,940.90, 4,413.16 and 1,209.54

Step by Step Solution

1. Step 1: Write the proportion equation
   2,940.90 : 4,413.16 = 1,209.54 : x
2. Step 2: Convert to fraction form
   2,940.90/4,413.16 = 1,209.54/x
3. Step 3: Cross multiply
   2,940.90x = 4,413.16 × 1,209.54
4. Step 4: Simplify right side
   2,940.90x = 5,337,893.55
5. Step 5: Solve for x
   x = 5,337,893.55/2,940.90
6. Step 6: Final answer
   x = 1,815.05