Finding the Fourth Proportional to 1,144.27, 1,716.31 and 322.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,144.27 : 1,716.31 = 322.50 : x
2. Step 2: Convert to fraction form
   1,144.27/1,716.31 = 322.50/x
3. Step 3: Cross multiply
   1,144.27x = 1,716.31 × 322.50
4. Step 4: Simplify right side
   1,144.27x = 553,509.98
5. Step 5: Solve for x
   x = 553,509.98/1,144.27
6. Step 6: Final answer
   x = 483.72