Finding the Fourth Proportional to 1,086.27, 1,629.63 and 355.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,086.27 : 1,629.63 = 355.83 : x
2. Step 2: Convert to fraction form
   1,086.27/1,629.63 = 355.83/x
3. Step 3: Cross multiply
   1,086.27x = 1,629.63 × 355.83
4. Step 4: Simplify right side
   1,086.27x = 579,871.24
5. Step 5: Solve for x
   x = 579,871.24/1,086.27
6. Step 6: Final answer
   x = 533.82