Finding the Fourth Proportional to 1,019.69, 1,529.53 and 326.35

Step by Step Solution

1. Step 1: Write the proportion equation
   1,019.69 : 1,529.53 = 326.35 : x
2. Step 2: Convert to fraction form
   1,019.69/1,529.53 = 326.35/x
3. Step 3: Cross multiply
   1,019.69x = 1,529.53 × 326.35
4. Step 4: Simplify right side
   1,019.69x = 499,162.12
5. Step 5: Solve for x
   x = 499,162.12/1,019.69
6. Step 6: Final answer
   x = 489.52