Finding the Fourth Proportional to 2,040.53, 3,061.94 and 870.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,040.53 : 3,061.94 = 870.40 : x
2. Step 2: Convert to fraction form
   2,040.53/3,061.94 = 870.40/x
3. Step 3: Cross multiply
   2,040.53x = 3,061.94 × 870.40
4. Step 4: Simplify right side
   2,040.53x = 2,665,112.05
5. Step 5: Solve for x
   x = 2,665,112.05/2,040.53
6. Step 6: Final answer
   x = 1,306.09