Finding the Fourth Proportional to 2,251.72, 3,107.42 and 1,256.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,251.72 : 3,107.42 = 1,256.96 : x
2. Step 2: Convert to fraction form
   2,251.72/3,107.42 = 1,256.96/x
3. Step 3: Cross multiply
   2,251.72x = 3,107.42 × 1,256.96
4. Step 4: Simplify right side
   2,251.72x = 3,905,902.64
5. Step 5: Solve for x
   x = 3,905,902.64/2,251.72
6. Step 6: Final answer
   x = 1,734.63