Finding the Fourth Proportional to 2,002.78, 2,763.78 and 1,163.43

Step by Step Solution

1. Step 1: Write the proportion equation
   2,002.78 : 2,763.78 = 1,163.43 : x
2. Step 2: Convert to fraction form
   2,002.78/2,763.78 = 1,163.43/x
3. Step 3: Cross multiply
   2,002.78x = 2,763.78 × 1,163.43
4. Step 4: Simplify right side
   2,002.78x = 3,215,464.57
5. Step 5: Solve for x
   x = 3,215,464.57/2,002.78
6. Step 6: Final answer
   x = 1,605.50