Finding the Fourth Proportional to 2,257.89, 3,384.52 and 870.68

Step by Step Solution

1. Step 1: Write the proportion equation
   2,257.89 : 3,384.52 = 870.68 : x
2. Step 2: Convert to fraction form
   2,257.89/3,384.52 = 870.68/x
3. Step 3: Cross multiply
   2,257.89x = 3,384.52 × 870.68
4. Step 4: Simplify right side
   2,257.89x = 2,946,812.60
5. Step 5: Solve for x
   x = 2,946,812.60/2,257.89
6. Step 6: Final answer
   x = 1,305.12