Finding the Fourth Proportional to 2,251.78, 3,107.32 and 1,257.01

Step by Step Solution

1. Step 1: Write the proportion equation
   2,251.78 : 3,107.32 = 1,257.01 : x
2. Step 2: Convert to fraction form
   2,251.78/3,107.32 = 1,257.01/x
3. Step 3: Cross multiply
   2,251.78x = 3,107.32 × 1,257.01
4. Step 4: Simplify right side
   2,251.78x = 3,905,932.31
5. Step 5: Solve for x
   x = 3,905,932.31/2,251.78
6. Step 6: Final answer
   x = 1,734.60