Finding the Fourth Proportional to 2,390.96, 3,584.27 and 851.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,390.96 : 3,584.27 = 851.60 : x
2. Step 2: Convert to fraction form
   2,390.96/3,584.27 = 851.60/x
3. Step 3: Cross multiply
   2,390.96x = 3,584.27 × 851.60
4. Step 4: Simplify right side
   2,390.96x = 3,052,348.54
5. Step 5: Solve for x
   x = 3,052,348.54/2,390.96
6. Step 6: Final answer
   x = 1,276.62