Finding the Fourth Proportional to 1,019.82, 1,530.60 and 403.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,019.82 : 1,530.60 = 403.96 : x
2. Step 2: Convert to fraction form
   1,019.82/1,530.60 = 403.96/x
3. Step 3: Cross multiply
   1,019.82x = 1,530.60 × 403.96
4. Step 4: Simplify right side
   1,019.82x = 618,301.18
5. Step 5: Solve for x
   x = 618,301.18/1,019.82
6. Step 6: Final answer
   x = 606.28