Finding the Fourth Proportional to 1,016.01, 1,524.06 and 285.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,016.01 : 1,524.06 = 285.69 : x
2. Step 2: Convert to fraction form
   1,016.01/1,524.06 = 285.69/x
3. Step 3: Cross multiply
   1,016.01x = 1,524.06 × 285.69
4. Step 4: Simplify right side
   1,016.01x = 435,408.70
5. Step 5: Solve for x
   x = 435,408.70/1,016.01
6. Step 6: Final answer
   x = 428.55