Finding the Fourth Proportional to 1,019.55, 1,529.37 and 326.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,019.55 : 1,529.37 = 326.32 : x
2. Step 2: Convert to fraction form
   1,019.55/1,529.37 = 326.32/x
3. Step 3: Cross multiply
   1,019.55x = 1,529.37 × 326.32
4. Step 4: Simplify right side
   1,019.55x = 499,054.74
5. Step 5: Solve for x
   x = 499,054.74/1,019.55
6. Step 6: Final answer
   x = 489.49