Finding the Fourth Proportional to 1,020.37, 1,530.22 and 404.29

Step by Step Solution

1. Step 1: Write the proportion equation
   1,020.37 : 1,530.22 = 404.29 : x
2. Step 2: Convert to fraction form
   1,020.37/1,530.22 = 404.29/x
3. Step 3: Cross multiply
   1,020.37x = 1,530.22 × 404.29
4. Step 4: Simplify right side
   1,020.37x = 618,653.17
5. Step 5: Solve for x
   x = 618,653.17/1,020.37
6. Step 6: Final answer
   x = 606.30