Finding the Fourth Proportional to 1,019.97, 1,530.15 and 326.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,019.97 : 1,530.15 = 326.58 : x
2. Step 2: Convert to fraction form
   1,019.97/1,530.15 = 326.58/x
3. Step 3: Cross multiply
   1,019.97x = 1,530.15 × 326.58
4. Step 4: Simplify right side
   1,019.97x = 499,716.39
5. Step 5: Solve for x
   x = 499,716.39/1,019.97
6. Step 6: Final answer
   x = 489.93