Finding the Fourth Proportional to 1,144.72, 1,579.98 and 679.04

Step by Step Solution

1. Step 1: Write the proportion equation
   1,144.72 : 1,579.98 = 679.04 : x
2. Step 2: Convert to fraction form
   1,144.72/1,579.98 = 679.04/x
3. Step 3: Cross multiply
   1,144.72x = 1,579.98 × 679.04
4. Step 4: Simplify right side
   1,144.72x = 1,072,869.62
5. Step 5: Solve for x
   x = 1,072,869.62/1,144.72
6. Step 6: Final answer
   x = 937.23