Finding the Fourth Proportional to 1,144.63, 1,579.59 and 672.84

Step by Step Solution

1. Step 1: Write the proportion equation
   1,144.63 : 1,579.59 = 672.84 : x
2. Step 2: Convert to fraction form
   1,144.63/1,579.59 = 672.84/x
3. Step 3: Cross multiply
   1,144.63x = 1,579.59 × 672.84
4. Step 4: Simplify right side
   1,144.63x = 1,062,811.34
5. Step 5: Solve for x
   x = 1,062,811.34/1,144.63
6. Step 6: Final answer
   x = 928.52