Finding the Fourth Proportional to 2,609.73, 3,914.17 and 854.71

Step by Step Solution

1. Step 1: Write the proportion equation
   2,609.73 : 3,914.17 = 854.71 : x
2. Step 2: Convert to fraction form
   2,609.73/3,914.17 = 854.71/x
3. Step 3: Cross multiply
   2,609.73x = 3,914.17 × 854.71
4. Step 4: Simplify right side
   2,609.73x = 3,345,468.32
5. Step 5: Solve for x
   x = 3,345,468.32/2,609.73
6. Step 6: Final answer
   x = 1,281.92