Finding the Fourth Proportional to 1,014.82, 1,521.69 and 321.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,014.82 : 1,521.69 = 321.30 : x
2. Step 2: Convert to fraction form
   1,014.82/1,521.69 = 321.30/x
3. Step 3: Cross multiply
   1,014.82x = 1,521.69 × 321.30
4. Step 4: Simplify right side
   1,014.82x = 488,917.79
5. Step 5: Solve for x
   x = 488,917.79/1,014.82
6. Step 6: Final answer
   x = 481.78