Finding the Fourth Proportional to 2,257.56, 3,383.91 and 870.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,257.56 : 3,383.91 = 870.42 : x
2. Step 2: Convert to fraction form
   2,257.56/3,383.91 = 870.42/x
3. Step 3: Cross multiply
   2,257.56x = 3,383.91 × 870.42
4. Step 4: Simplify right side
   2,257.56x = 2,945,422.94
5. Step 5: Solve for x
   x = 2,945,422.94/2,257.56
6. Step 6: Final answer
   x = 1,304.69