Finding the Fourth Proportional to 2,391.30, 3,584.78 and 851.94

Step by Step Solution

1. Step 1: Write the proportion equation
   2,391.30 : 3,584.78 = 851.94 : x
2. Step 2: Convert to fraction form
   2,391.30/3,584.78 = 851.94/x
3. Step 3: Cross multiply
   2,391.30x = 3,584.78 × 851.94
4. Step 4: Simplify right side
   2,391.30x = 3,054,017.47
5. Step 5: Solve for x
   x = 3,054,017.47/2,391.30
6. Step 6: Final answer
   x = 1,277.14