Finding the Fourth Proportional to 1,863.10, 2,570.83 and 1,155.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,863.10 : 2,570.83 = 1,155.10 : x
2. Step 2: Convert to fraction form
   1,863.10/2,570.83 = 1,155.10/x
3. Step 3: Cross multiply
   1,863.10x = 2,570.83 × 1,155.10
4. Step 4: Simplify right side
   1,863.10x = 2,969,565.73
5. Step 5: Solve for x
   x = 2,969,565.73/1,863.10
6. Step 6: Final answer
   x = 1,593.88