Finding the Fourth Proportional to 2,085.75, 3,128.08 and 852.93

Step by Step Solution

1. Step 1: Write the proportion equation
   2,085.75 : 3,128.08 = 852.93 : x
2. Step 2: Convert to fraction form
   2,085.75/3,128.08 = 852.93/x
3. Step 3: Cross multiply
   2,085.75x = 3,128.08 × 852.93
4. Step 4: Simplify right side
   2,085.75x = 2,668,033.27
5. Step 5: Solve for x
   x = 2,668,033.27/2,085.75
6. Step 6: Final answer
   x = 1,279.17