Finding the Fourth Proportional to 1,020.69, 1,531.01 and 327.33

Step by Step Solution

1. Step 1: Write the proportion equation
   1,020.69 : 1,531.01 = 327.33 : x
2. Step 2: Convert to fraction form
   1,020.69/1,531.01 = 327.33/x
3. Step 3: Cross multiply
   1,020.69x = 1,531.01 × 327.33
4. Step 4: Simplify right side
   1,020.69x = 501,146.32
5. Step 5: Solve for x
   x = 501,146.32/1,020.69
6. Step 6: Final answer
   x = 490.99