Finding the Fourth Proportional to 1,144.34, 1,716.40 and 311.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,144.34 : 1,716.40 = 311.37 : x
2. Step 2: Convert to fraction form
   1,144.34/1,716.40 = 311.37/x
3. Step 3: Cross multiply
   1,144.34x = 1,716.40 × 311.37
4. Step 4: Simplify right side
   1,144.34x = 534,426.89
5. Step 5: Solve for x
   x = 534,426.89/1,144.34
6. Step 6: Final answer
   x = 467.02