Finding the Fourth Proportional to 1,015.10, 1,522.42 and 321.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,015.10 : 1,522.42 = 321.82 : x
2. Step 2: Convert to fraction form
   1,015.10/1,522.42 = 321.82/x
3. Step 3: Cross multiply
   1,015.10x = 1,522.42 × 321.82
4. Step 4: Simplify right side
   1,015.10x = 489,935.98
5. Step 5: Solve for x
   x = 489,935.98/1,015.10
6. Step 6: Final answer
   x = 482.65