Finding the Fourth Proportional to 2,855.32, 4,281.90 and 1,123

Step by Step Solution

1. Step 1: Write the proportion equation
   2,855.32 : 4,281.90 = 1,123 : x
2. Step 2: Convert to fraction form
   2,855.32/4,281.90 = 1,123/x
3. Step 3: Cross multiply
   2,855.32x = 4,281.90 × 1,123
4. Step 4: Simplify right side
   2,855.32x = 4,808,573.70
5. Step 5: Solve for x
   x = 4,808,573.70/2,855.32
6. Step 6: Final answer
   x = 1,684.08