Finding the Fourth Proportional to 2,722.38, 3,757.89 and 1,728.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,722.38 : 3,757.89 = 1,728.30 : x
2. Step 2: Convert to fraction form
   2,722.38/3,757.89 = 1,728.30/x
3. Step 3: Cross multiply
   2,722.38x = 3,757.89 × 1,728.30
4. Step 4: Simplify right side
   2,722.38x = 6,494,761.29
5. Step 5: Solve for x
   x = 6,494,761.29/2,722.38
6. Step 6: Final answer
   x = 2,385.69