Finding the Fourth Proportional to 1,143.27, 1,714.82 and 321.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,143.27 : 1,714.82 = 321.50 : x
2. Step 2: Convert to fraction form
   1,143.27/1,714.82 = 321.50/x
3. Step 3: Cross multiply
   1,143.27x = 1,714.82 × 321.50
4. Step 4: Simplify right side
   1,143.27x = 551,304.45
5. Step 5: Solve for x
   x = 551,304.45/1,143.27
6. Step 6: Final answer
   x = 482.22