Finding the Fourth Proportional to 2,817.89, 4,227.38 and 1,086.38

Step by Step Solution

1. Step 1: Write the proportion equation
   2,817.89 : 4,227.38 = 1,086.38 : x
2. Step 2: Convert to fraction form
   2,817.89/4,227.38 = 1,086.38/x
3. Step 3: Cross multiply
   2,817.89x = 4,227.38 × 1,086.38
4. Step 4: Simplify right side
   2,817.89x = 4,592,541.08
5. Step 5: Solve for x
   x = 4,592,541.08/2,817.89
6. Step 6: Final answer
   x = 1,629.78