Finding the Fourth Proportional to 2,815.39, 4,223.53 and 1,255.94

Step by Step Solution

1. Step 1: Write the proportion equation
   2,815.39 : 4,223.53 = 1,255.94 : x
2. Step 2: Convert to fraction form
   2,815.39/4,223.53 = 1,255.94/x
3. Step 3: Cross multiply
   2,815.39x = 4,223.53 × 1,255.94
4. Step 4: Simplify right side
   2,815.39x = 5,304,500.27
5. Step 5: Solve for x
   x = 5,304,500.27/2,815.39
6. Step 6: Final answer
   x = 1,884.11