Finding the Fourth Proportional to 2,257.84, 3,384.72 and 870.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,257.84 : 3,384.72 = 870.30 : x
2. Step 2: Convert to fraction form
   2,257.84/3,384.72 = 870.30/x
3. Step 3: Cross multiply
   2,257.84x = 3,384.72 × 870.30
4. Step 4: Simplify right side
   2,257.84x = 2,945,721.82
5. Step 5: Solve for x
   x = 2,945,721.82/2,257.84
6. Step 6: Final answer
   x = 1,304.66