Finding the Fourth Proportional to 2,644.72, 3,961.40 and 1,255.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,644.72 : 3,961.40 = 1,255.96 : x
2. Step 2: Convert to fraction form
   2,644.72/3,961.40 = 1,255.96/x
3. Step 3: Cross multiply
   2,644.72x = 3,961.40 × 1,255.96
4. Step 4: Simplify right side
   2,644.72x = 4,975,359.94
5. Step 5: Solve for x
   x = 4,975,359.94/2,644.72
6. Step 6: Final answer
   x = 1,881.24