Finding the Fourth Proportional to 1,144.27, 1,579.11 and 672.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,144.27 : 1,579.11 = 672.05 : x
2. Step 2: Convert to fraction form
   1,144.27/1,579.11 = 672.05/x
3. Step 3: Cross multiply
   1,144.27x = 1,579.11 × 672.05
4. Step 4: Simplify right side
   1,144.27x = 1,061,240.88
5. Step 5: Solve for x
   x = 1,061,240.88/1,144.27
6. Step 6: Final answer
   x = 927.44