Finding the Fourth Proportional to 1,144.98, 1,717.50 and 323.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,144.98 : 1,717.50 = 323.21 : x
2. Step 2: Convert to fraction form
   1,144.98/1,717.50 = 323.21/x
3. Step 3: Cross multiply
   1,144.98x = 1,717.50 × 323.21
4. Step 4: Simplify right side
   1,144.98x = 555,104.59
5. Step 5: Solve for x
   x = 555,104.59/1,144.98
6. Step 6: Final answer
   x = 484.82