Finding the Fourth Proportional to 1,086.50, 1,629.48 and 356.51

Step by Step Solution

1. Step 1: Write the proportion equation
   1,086.50 : 1,629.48 = 356.51 : x
2. Step 2: Convert to fraction form
   1,086.50/1,629.48 = 356.51/x
3. Step 3: Cross multiply
   1,086.50x = 1,629.48 × 356.51
4. Step 4: Simplify right side
   1,086.50x = 580,931.33
5. Step 5: Solve for x
   x = 580,931.33/1,086.50
6. Step 6: Final answer
   x = 534.68