Finding the Fourth Proportional to 1,148.27, 1,722.42 and 326.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,148.27 : 1,722.42 = 326.55 : x
2. Step 2: Convert to fraction form
   1,148.27/1,722.42 = 326.55/x
3. Step 3: Cross multiply
   1,148.27x = 1,722.42 × 326.55
4. Step 4: Simplify right side
   1,148.27x = 562,456.25
5. Step 5: Solve for x
   x = 562,456.25/1,148.27
6. Step 6: Final answer
   x = 489.83