Finding the Fourth Proportional to 1,019.99, 1,529.89 and 403.53

Step by Step Solution

1. Step 1: Write the proportion equation
   1,019.99 : 1,529.89 = 403.53 : x
2. Step 2: Convert to fraction form
   1,019.99/1,529.89 = 403.53/x
3. Step 3: Cross multiply
   1,019.99x = 1,529.89 × 403.53
4. Step 4: Simplify right side
   1,019.99x = 617,358.37
5. Step 5: Solve for x
   x = 617,358.37/1,019.99
6. Step 6: Final answer
   x = 605.26