Finding the Fourth Proportional to 4,800, 7,200.72 and 1,722.72

Step by Step Solution

1. Step 1: Write the proportion equation
   4,800 : 7,200.72 = 1,722.72 : x
2. Step 2: Convert to fraction form
   4,800/7,200.72 = 1,722.72/x
3. Step 3: Cross multiply
   4,800x = 7,200.72 × 1,722.72
4. Step 4: Simplify right side
   4,800x = 12,404,824.36
5. Step 5: Solve for x
   x = 12,404,824.36/4,800
6. Step 6: Final answer
   x = 2,584.34