Finding the Fourth Proportional to 1,019.41, 1,529.12 and 326.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,019.41 : 1,529.12 = 326.15 : x
2. Step 2: Convert to fraction form
   1,019.41/1,529.12 = 326.15/x
3. Step 3: Cross multiply
   1,019.41x = 1,529.12 × 326.15
4. Step 4: Simplify right side
   1,019.41x = 498,722.49
5. Step 5: Solve for x
   x = 498,722.49/1,019.41
6. Step 6: Final answer
   x = 489.23