Finding the Fourth Proportional to 1,019.95, 1,528.89 and 403.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,019.95 : 1,528.89 = 403.31 : x
2. Step 2: Convert to fraction form
   1,019.95/1,528.89 = 403.31/x
3. Step 3: Cross multiply
   1,019.95x = 1,528.89 × 403.31
4. Step 4: Simplify right side
   1,019.95x = 616,616.63
5. Step 5: Solve for x
   x = 616,616.63/1,019.95
6. Step 6: Final answer
   x = 604.56