Finding the Fourth Proportional to 2,251.71, 3,107.34 and 1,257.03

Step by Step Solution

1. Step 1: Write the proportion equation
   2,251.71 : 3,107.34 = 1,257.03 : x
2. Step 2: Convert to fraction form
   2,251.71/3,107.34 = 1,257.03/x
3. Step 3: Cross multiply
   2,251.71x = 3,107.34 × 1,257.03
4. Step 4: Simplify right side
   2,251.71x = 3,906,019.60
5. Step 5: Solve for x
   x = 3,906,019.60/2,251.71
6. Step 6: Final answer
   x = 1,734.69