Finding the Fourth Proportional to 2,085.35, 3,126.60 and 852.39

Step by Step Solution

1. Step 1: Write the proportion equation
   2,085.35 : 3,126.60 = 852.39 : x
2. Step 2: Convert to fraction form
   2,085.35/3,126.60 = 852.39/x
3. Step 3: Cross multiply
   2,085.35x = 3,126.60 × 852.39
4. Step 4: Simplify right side
   2,085.35x = 2,665,082.57
5. Step 5: Solve for x
   x = 2,665,082.57/2,085.35
6. Step 6: Final answer
   x = 1,278.01