Finding the Fourth Proportional to 2,854.57, 4,281.76 and 1,389.37

Step by Step Solution

1. Step 1: Write the proportion equation
   2,854.57 : 4,281.76 = 1,389.37 : x
2. Step 2: Convert to fraction form
   2,854.57/4,281.76 = 1,389.37/x
3. Step 3: Cross multiply
   2,854.57x = 4,281.76 × 1,389.37
4. Step 4: Simplify right side
   2,854.57x = 5,948,948.89
5. Step 5: Solve for x
   x = 5,948,948.89/2,854.57
6. Step 6: Final answer
   x = 2,084.01