Finding the Fourth Proportional to 2,079.81, 3,120.21 and 1,040.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,079.81 : 3,120.21 = 1,040.25 : x
2. Step 2: Convert to fraction form
   2,079.81/3,120.21 = 1,040.25/x
3. Step 3: Cross multiply
   2,079.81x = 3,120.21 × 1,040.25
4. Step 4: Simplify right side
   2,079.81x = 3,245,798.45
5. Step 5: Solve for x
   x = 3,245,798.45/2,079.81
6. Step 6: Final answer
   x = 1,560.62