Finding the Fourth Proportional to 1,144.16, 1,578.92 and 672.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,144.16 : 1,578.92 = 672.06 : x
2. Step 2: Convert to fraction form
   1,144.16/1,578.92 = 672.06/x
3. Step 3: Cross multiply
   1,144.16x = 1,578.92 × 672.06
4. Step 4: Simplify right side
   1,144.16x = 1,061,128.98
5. Step 5: Solve for x
   x = 1,061,128.98/1,144.16
6. Step 6: Final answer
   x = 927.43