Finding the Fourth Proportional to 2,085.08, 3,127.55 and 852.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,085.08 : 3,127.55 = 852.15 : x
2. Step 2: Convert to fraction form
   2,085.08/3,127.55 = 852.15/x
3. Step 3: Cross multiply
   2,085.08x = 3,127.55 × 852.15
4. Step 4: Simplify right side
   2,085.08x = 2,665,149.20
5. Step 5: Solve for x
   x = 2,665,149.20/2,085.08
6. Step 6: Final answer
   x = 1,278.20