Finding the Fourth Proportional to 1,863.54, 2,572.43 and 1,155.53

Step by Step Solution

1. Step 1: Write the proportion equation
   1,863.54 : 2,572.43 = 1,155.53 : x
2. Step 2: Convert to fraction form
   1,863.54/2,572.43 = 1,155.53/x
3. Step 3: Cross multiply
   1,863.54x = 2,572.43 × 1,155.53
4. Step 4: Simplify right side
   1,863.54x = 2,972,520.69
5. Step 5: Solve for x
   x = 2,972,520.69/1,863.54
6. Step 6: Final answer
   x = 1,595.09