Finding the Fourth Proportional to 2,040.24, 3,061.31 and 870.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,040.24 : 3,061.31 = 870.60 : x
2. Step 2: Convert to fraction form
   2,040.24/3,061.31 = 870.60/x
3. Step 3: Cross multiply
   2,040.24x = 3,061.31 × 870.60
4. Step 4: Simplify right side
   2,040.24x = 2,665,172.13
5. Step 5: Solve for x
   x = 2,665,172.13/2,040.24
6. Step 6: Final answer
   x = 1,306.30