Finding the Fourth Proportional to 1,144.29, 1,578.99 and 672.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,144.29 : 1,578.99 = 672.16 : x
2. Step 2: Convert to fraction form
   1,144.29/1,578.99 = 672.16/x
3. Step 3: Cross multiply
   1,144.29x = 1,578.99 × 672.16
4. Step 4: Simplify right side
   1,144.29x = 1,061,333.92
5. Step 5: Solve for x
   x = 1,061,333.92/1,144.29
6. Step 6: Final answer
   x = 927.50