Finding the Fourth Proportional to 1,019.71, 1,529.46 and 326.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,019.71 : 1,529.46 = 326.38 : x
2. Step 2: Convert to fraction form
   1,019.71/1,529.46 = 326.38/x
3. Step 3: Cross multiply
   1,019.71x = 1,529.46 × 326.38
4. Step 4: Simplify right side
   1,019.71x = 499,185.15
5. Step 5: Solve for x
   x = 499,185.15/1,019.71
6. Step 6: Final answer
   x = 489.54