Finding the Fourth Proportional to 1,144.29, 1,578.93 and 672.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,144.29 : 1,578.93 = 672.09 : x
2. Step 2: Convert to fraction form
   1,144.29/1,578.93 = 672.09/x
3. Step 3: Cross multiply
   1,144.29x = 1,578.93 × 672.09
4. Step 4: Simplify right side
   1,144.29x = 1,061,176.85
5. Step 5: Solve for x
   x = 1,061,176.85/1,144.29
6. Step 6: Final answer
   x = 927.37