Finding the Fourth Proportional to 2,022.35, 2,790.63 and 1,138.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,022.35 : 2,790.63 = 1,138.10 : x
2. Step 2: Convert to fraction form
   2,022.35/2,790.63 = 1,138.10/x
3. Step 3: Cross multiply
   2,022.35x = 2,790.63 × 1,138.10
4. Step 4: Simplify right side
   2,022.35x = 3,176,002.05
5. Step 5: Solve for x
   x = 3,176,002.05/2,022.35
6. Step 6: Final answer
   x = 1,570.46