Finding the Fourth Proportional to 2,022.39, 2,790.73 and 1,138.03

Step by Step Solution

1. Step 1: Write the proportion equation
   2,022.39 : 2,790.73 = 1,138.03 : x
2. Step 2: Convert to fraction form
   2,022.39/2,790.73 = 1,138.03/x
3. Step 3: Cross multiply
   2,022.39x = 2,790.73 × 1,138.03
4. Step 4: Simplify right side
   2,022.39x = 3,175,914.82
5. Step 5: Solve for x
   x = 3,175,914.82/2,022.39
6. Step 6: Final answer
   x = 1,570.38