Finding the Fourth Proportional to 2,185.73, 3,278.42 and 869.43

Step by Step Solution

1. Step 1: Write the proportion equation
   2,185.73 : 3,278.42 = 869.43 : x
2. Step 2: Convert to fraction form
   2,185.73/3,278.42 = 869.43/x
3. Step 3: Cross multiply
   2,185.73x = 3,278.42 × 869.43
4. Step 4: Simplify right side
   2,185.73x = 2,850,372.80
5. Step 5: Solve for x
   x = 2,850,372.80/2,185.73
6. Step 6: Final answer
   x = 1,304.08