Finding the Fourth Proportional to 2,023.08, 2,791.56 and 1,138.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,023.08 : 2,791.56 = 1,138.72 : x
2. Step 2: Convert to fraction form
   2,023.08/2,791.56 = 1,138.72/x
3. Step 3: Cross multiply
   2,023.08x = 2,791.56 × 1,138.72
4. Step 4: Simplify right side
   2,023.08x = 3,178,805.20
5. Step 5: Solve for x
   x = 3,178,805.20/2,023.08
6. Step 6: Final answer
   x = 1,571.27