Finding the Fourth Proportional to 2,722.56, 4,083.17 and 1,260.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,722.56 : 4,083.17 = 1,260.31 : x
2. Step 2: Convert to fraction form
   2,722.56/4,083.17 = 1,260.31/x
3. Step 3: Cross multiply
   2,722.56x = 4,083.17 × 1,260.31
4. Step 4: Simplify right side
   2,722.56x = 5,146,059.98
5. Step 5: Solve for x
   x = 5,146,059.98/2,722.56
6. Step 6: Final answer
   x = 1,890.15