Finding the Fourth Proportional to 2,022.07, 2,790.56 and 1,137.92

Step by Step Solution

1. Step 1: Write the proportion equation
   2,022.07 : 2,790.56 = 1,137.92 : x
2. Step 2: Convert to fraction form
   2,022.07/2,790.56 = 1,137.92/x
3. Step 3: Cross multiply
   2,022.07x = 2,790.56 × 1,137.92
4. Step 4: Simplify right side
   2,022.07x = 3,175,434.04
5. Step 5: Solve for x
   x = 3,175,434.04/2,022.07
6. Step 6: Final answer
   x = 1,570.39