Finding the Fourth Proportional to 1,144.78, 1,580.06 and 672.73

Step by Step Solution

1. Step 1: Write the proportion equation
   1,144.78 : 1,580.06 = 672.73 : x
2. Step 2: Convert to fraction form
   1,144.78/1,580.06 = 672.73/x
3. Step 3: Cross multiply
   1,144.78x = 1,580.06 × 672.73
4. Step 4: Simplify right side
   1,144.78x = 1,062,953.76
5. Step 5: Solve for x
   x = 1,062,953.76/1,144.78
6. Step 6: Final answer
   x = 928.52