Finding the Fourth Proportional to 1,014.72, 1,522.32 and 321.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,014.72 : 1,522.32 = 321.42 : x
2. Step 2: Convert to fraction form
   1,014.72/1,522.32 = 321.42/x
3. Step 3: Cross multiply
   1,014.72x = 1,522.32 × 321.42
4. Step 4: Simplify right side
   1,014.72x = 489,304.09
5. Step 5: Solve for x
   x = 489,304.09/1,014.72
6. Step 6: Final answer
   x = 482.21