Finding the Fourth Proportional to 3,426.26, 5,139.48 and 1,086.27

Step by Step Solution

1. Step 1: Write the proportion equation
   3,426.26 : 5,139.48 = 1,086.27 : x
2. Step 2: Convert to fraction form
   3,426.26/5,139.48 = 1,086.27/x
3. Step 3: Cross multiply
   3,426.26x = 5,139.48 × 1,086.27
4. Step 4: Simplify right side
   3,426.26x = 5,582,862.94
5. Step 5: Solve for x
   x = 5,582,862.94/3,426.26
6. Step 6: Final answer
   x = 1,629.44