Finding the Fourth Proportional to 971.30, 1,456.41 and 321.98

Step by Step Solution

1. Step 1: Write the proportion equation
   971.30 : 1,456.41 = 321.98 : x
2. Step 2: Convert to fraction form
   971.30/1,456.41 = 321.98/x
3. Step 3: Cross multiply
   971.30x = 1,456.41 × 321.98
4. Step 4: Simplify right side
   971.30x = 468,934.89
5. Step 5: Solve for x
   x = 468,934.89/971.30
6. Step 6: Final answer
   x = 482.79