Finding the Fourth Proportional to 2,081.20, 3,120.72 and 1,040.08

Step by Step Solution

1. Step 1: Write the proportion equation
   2,081.20 : 3,120.72 = 1,040.08 : x
2. Step 2: Convert to fraction form
   2,081.20/3,120.72 = 1,040.08/x
3. Step 3: Cross multiply
   2,081.20x = 3,120.72 × 1,040.08
4. Step 4: Simplify right side
   2,081.20x = 3,245,798.46
5. Step 5: Solve for x
   x = 3,245,798.46/2,081.20
6. Step 6: Final answer
   x = 1,559.58