Finding the Fourth Proportional to 2,391.71, 3,585.40 and 852.35

Step by Step Solution

1. Step 1: Write the proportion equation
   2,391.71 : 3,585.40 = 852.35 : x
2. Step 2: Convert to fraction form
   2,391.71/3,585.40 = 852.35/x
3. Step 3: Cross multiply
   2,391.71x = 3,585.40 × 852.35
4. Step 4: Simplify right side
   2,391.71x = 3,055,993.50
5. Step 5: Solve for x
   x = 3,055,993.50/2,391.71
6. Step 6: Final answer
   x = 1,277.75