Finding the Fourth Proportional to 2,857.61, 4,287.69 and 1,817.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,857.61 : 4,287.69 = 1,817.34 : x
2. Step 2: Convert to fraction form
   2,857.61/4,287.69 = 1,817.34/x
3. Step 3: Cross multiply
   2,857.61x = 4,287.69 × 1,817.34
4. Step 4: Simplify right side
   2,857.61x = 7,792,190.54
5. Step 5: Solve for x
   x = 7,792,190.54/2,857.61
6. Step 6: Final answer
   x = 2,726.82