Finding the Fourth Proportional to 2,251.89, 3,107.52 and 1,257.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,251.89 : 3,107.52 = 1,257.15 : x
2. Step 2: Convert to fraction form
   2,251.89/3,107.52 = 1,257.15/x
3. Step 3: Cross multiply
   2,251.89x = 3,107.52 × 1,257.15
4. Step 4: Simplify right side
   2,251.89x = 3,906,618.77
5. Step 5: Solve for x
   x = 3,906,618.77/2,251.89
6. Step 6: Final answer
   x = 1,734.82