Finding the Fourth Proportional to 2,081.34, 3,120.30 and 1,040.09

Step by Step Solution

1. Step 1: Write the proportion equation
   2,081.34 : 3,120.30 = 1,040.09 : x
2. Step 2: Convert to fraction form
   2,081.34/3,120.30 = 1,040.09/x
3. Step 3: Cross multiply
   2,081.34x = 3,120.30 × 1,040.09
4. Step 4: Simplify right side
   2,081.34x = 3,245,377.23
5. Step 5: Solve for x
   x = 3,245,377.23/2,081.34
6. Step 6: Final answer
   x = 1,559.27