Finding the Fourth Proportional to 978.57, 1,468.17 and 329.31

Step by Step Solution

1. Step 1: Write the proportion equation
   978.57 : 1,468.17 = 329.31 : x
2. Step 2: Convert to fraction form
   978.57/1,468.17 = 329.31/x
3. Step 3: Cross multiply
   978.57x = 1,468.17 × 329.31
4. Step 4: Simplify right side
   978.57x = 483,483.06
5. Step 5: Solve for x
   x = 483,483.06/978.57
6. Step 6: Final answer
   x = 494.07