Finding the Fourth Proportional to 2,671.72, 4,007.12 and 724.08

Step by Step Solution

1. Step 1: Write the proportion equation
   2,671.72 : 4,007.12 = 724.08 : x
2. Step 2: Convert to fraction form
   2,671.72/4,007.12 = 724.08/x
3. Step 3: Cross multiply
   2,671.72x = 4,007.12 × 724.08
4. Step 4: Simplify right side
   2,671.72x = 2,901,475.45
5. Step 5: Solve for x
   x = 2,901,475.45/2,671.72
6. Step 6: Final answer
   x = 1,086.00