Finding the Fourth Proportional to 1,020.84, 1,530.36 and 443.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,020.84 : 1,530.36 = 443.52 : x
2. Step 2: Convert to fraction form
   1,020.84/1,530.36 = 443.52/x
3. Step 3: Cross multiply
   1,020.84x = 1,530.36 × 443.52
4. Step 4: Simplify right side
   1,020.84x = 678,745.27
5. Step 5: Solve for x
   x = 678,745.27/1,020.84
6. Step 6: Final answer
   x = 664.89