Finding the Fourth Proportional to 2,023.16, 2,791.94 and 1,139.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,023.16 : 2,791.94 = 1,139.12 : x
2. Step 2: Convert to fraction form
   2,023.16/2,791.94 = 1,139.12/x
3. Step 3: Cross multiply
   2,023.16x = 2,791.94 × 1,139.12
4. Step 4: Simplify right side
   2,023.16x = 3,180,354.69
5. Step 5: Solve for x
   x = 3,180,354.69/2,023.16
6. Step 6: Final answer
   x = 1,571.97