Finding the Fourth Proportional to 1,144.79, 1,580.04 and 672.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,144.79 : 1,580.04 = 672.96 : x
2. Step 2: Convert to fraction form
   1,144.79/1,580.04 = 672.96/x
3. Step 3: Cross multiply
   1,144.79x = 1,580.04 × 672.96
4. Step 4: Simplify right side
   1,144.79x = 1,063,303.72
5. Step 5: Solve for x
   x = 1,063,303.72/1,144.79
6. Step 6: Final answer
   x = 928.82