Finding the Fourth Proportional to 2,085.12, 2,885.76 and 1,791.36

Step by Step Solution

1. Step 1: Write the proportion equation
   2,085.12 : 2,885.76 = 1,791.36 : x
2. Step 2: Convert to fraction form
   2,085.12/2,885.76 = 1,791.36/x
3. Step 3: Cross multiply
   2,085.12x = 2,885.76 × 1,791.36
4. Step 4: Simplify right side
   2,085.12x = 5,169,435.03
5. Step 5: Solve for x
   x = 5,169,435.03/2,085.12
6. Step 6: Final answer
   x = 2,479.20