Finding the Fourth Proportional to 2,022.56, 2,791.20 and 1,138.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,022.56 : 2,791.20 = 1,138.52 : x
2. Step 2: Convert to fraction form
   2,022.56/2,791.20 = 1,138.52/x
3. Step 3: Cross multiply
   2,022.56x = 2,791.20 × 1,138.52
4. Step 4: Simplify right side
   2,022.56x = 3,177,837.02
5. Step 5: Solve for x
   x = 3,177,837.02/2,022.56
6. Step 6: Final answer
   x = 1,571.20