Finding the Fourth Proportional to 1,017.72, 1,526.76 and 324.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,017.72 : 1,526.76 = 324.54 : x
2. Step 2: Convert to fraction form
   1,017.72/1,526.76 = 324.54/x
3. Step 3: Cross multiply
   1,017.72x = 1,526.76 × 324.54
4. Step 4: Simplify right side
   1,017.72x = 495,494.69
5. Step 5: Solve for x
   x = 495,494.69/1,017.72
6. Step 6: Final answer
   x = 486.87