Finding the Fourth Proportional to 1,144.63, 1,716.72 and 322.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,144.63 : 1,716.72 = 322.69 : x
2. Step 2: Convert to fraction form
   1,144.63/1,716.72 = 322.69/x
3. Step 3: Cross multiply
   1,144.63x = 1,716.72 × 322.69
4. Step 4: Simplify right side
   1,144.63x = 553,968.38
5. Step 5: Solve for x
   x = 553,968.38/1,144.63
6. Step 6: Final answer
   x = 483.97