Finding the Fourth Proportional to 1,014.72, 1,522.29 and 321.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,014.72 : 1,522.29 = 321.57 : x
2. Step 2: Convert to fraction form
   1,014.72/1,522.29 = 321.57/x
3. Step 3: Cross multiply
   1,014.72x = 1,522.29 × 321.57
4. Step 4: Simplify right side
   1,014.72x = 489,522.80
5. Step 5: Solve for x
   x = 489,522.80/1,014.72
6. Step 6: Final answer
   x = 482.42