Finding the Fourth Proportional to 2,022.71, 2,791.49 and 1,138.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,022.71 : 2,791.49 = 1,138.59 : x
2. Step 2: Convert to fraction form
   2,022.71/2,791.49 = 1,138.59/x
3. Step 3: Cross multiply
   2,022.71x = 2,791.49 × 1,138.59
4. Step 4: Simplify right side
   2,022.71x = 3,178,356.91
5. Step 5: Solve for x
   x = 3,178,356.91/2,022.71
6. Step 6: Final answer
   x = 1,571.34