Finding the Fourth Proportional to 1,144.86, 1,579.50 and 672.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,144.86 : 1,579.50 = 672.69 : x
2. Step 2: Convert to fraction form
   1,144.86/1,579.50 = 672.69/x
3. Step 3: Cross multiply
   1,144.86x = 1,579.50 × 672.69
4. Step 4: Simplify right side
   1,144.86x = 1,062,513.86
5. Step 5: Solve for x
   x = 1,062,513.86/1,144.86
6. Step 6: Final answer
   x = 928.07