Finding the Fourth Proportional to 2,509.57, 3,763.82 and 843.54

Step by Step Solution

1. Step 1: Write the proportion equation
   2,509.57 : 3,763.82 = 843.54 : x
2. Step 2: Convert to fraction form
   2,509.57/3,763.82 = 843.54/x
3. Step 3: Cross multiply
   2,509.57x = 3,763.82 × 843.54
4. Step 4: Simplify right side
   2,509.57x = 3,174,920.72
5. Step 5: Solve for x
   x = 3,174,920.72/2,509.57
6. Step 6: Final answer
   x = 1,265.12