Finding the Fourth Proportional to 2,085.60, 2,879.22 and 1,340.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,085.60 : 2,879.22 = 1,340.16 : x
2. Step 2: Convert to fraction form
   2,085.60/2,879.22 = 1,340.16/x
3. Step 3: Cross multiply
   2,085.60x = 2,879.22 × 1,340.16
4. Step 4: Simplify right side
   2,085.60x = 3,858,615.48
5. Step 5: Solve for x
   x = 3,858,615.48/2,085.60
6. Step 6: Final answer
   x = 1,850.12