Finding the Fourth Proportional to 2,022.33, 2,790.82 and 1,138.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,022.33 : 2,790.82 = 1,138.15 : x
2. Step 2: Convert to fraction form
   2,022.33/2,790.82 = 1,138.15/x
3. Step 3: Cross multiply
   2,022.33x = 2,790.82 × 1,138.15
4. Step 4: Simplify right side
   2,022.33x = 3,176,366.23
5. Step 5: Solve for x
   x = 3,176,366.23/2,022.33
6. Step 6: Final answer
   x = 1,570.65