Finding the Fourth Proportional to 2,254.72, 3,111.81 and 1,260.21

Step by Step Solution

1. Step 1: Write the proportion equation
   2,254.72 : 3,111.81 = 1,260.21 : x
2. Step 2: Convert to fraction form
   2,254.72/3,111.81 = 1,260.21/x
3. Step 3: Cross multiply
   2,254.72x = 3,111.81 × 1,260.21
4. Step 4: Simplify right side
   2,254.72x = 3,921,516.16
5. Step 5: Solve for x
   x = 3,921,516.16/2,254.72
6. Step 6: Final answer
   x = 1,739.25