Finding the Fourth Proportional to 2,761.20, 4,143.83 and 1,722.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,761.20 : 4,143.83 = 1,722.72 : x
2. Step 2: Convert to fraction form
   2,761.20/4,143.83 = 1,722.72/x
3. Step 3: Cross multiply
   2,761.20x = 4,143.83 × 1,722.72
4. Step 4: Simplify right side
   2,761.20x = 7,138,658.82
5. Step 5: Solve for x
   x = 7,138,658.82/2,761.20
6. Step 6: Final answer
   x = 2,585.35