Finding the Fourth Proportional to 2,255.42, 3,382.79 and 869.41

Step by Step Solution

1. Step 1: Write the proportion equation
   2,255.42 : 3,382.79 = 869.41 : x
2. Step 2: Convert to fraction form
   2,255.42/3,382.79 = 869.41/x
3. Step 3: Cross multiply
   2,255.42x = 3,382.79 × 869.41
4. Step 4: Simplify right side
   2,255.42x = 2,941,024.27
5. Step 5: Solve for x
   x = 2,941,024.27/2,255.42
6. Step 6: Final answer
   x = 1,303.98