Finding the Fourth Proportional to 2,702.81, 4,054.00 and 853.98

Step by Step Solution

1. Step 1: Write the proportion equation
   2,702.81 : 4,054.00 = 853.98 : x
2. Step 2: Convert to fraction form
   2,702.81/4,054.00 = 853.98/x
3. Step 3: Cross multiply
   2,702.81x = 4,054.00 × 853.98
4. Step 4: Simplify right side
   2,702.81x = 3,462,010.38
5. Step 5: Solve for x
   x = 3,462,010.38/2,702.81
6. Step 6: Final answer
   x = 1,280.90