Finding the Fourth Proportional to 2,791.20, 4,183.16 and 1,406.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,791.20 : 4,183.16 = 1,406.10 : x
2. Step 2: Convert to fraction form
   2,791.20/4,183.16 = 1,406.10/x
3. Step 3: Cross multiply
   2,791.20x = 4,183.16 × 1,406.10
4. Step 4: Simplify right side
   2,791.20x = 5,881,934.25
5. Step 5: Solve for x
   x = 5,881,934.25/2,791.20
6. Step 6: Final answer
   x = 2,107.31