Finding the Fourth Proportional to 2,702.87, 4,054.71 and 853.37

Step by Step Solution

1. Step 1: Write the proportion equation
   2,702.87 : 4,054.71 = 853.37 : x
2. Step 2: Convert to fraction form
   2,702.87/4,054.71 = 853.37/x
3. Step 3: Cross multiply
   2,702.87x = 4,054.71 × 853.37
4. Step 4: Simplify right side
   2,702.87x = 3,460,147.60
5. Step 5: Solve for x
   x = 3,460,147.60/2,702.87
6. Step 6: Final answer
   x = 1,280.18