Finding the Fourth Proportional to 2,251.47, 3,106.89 and 1,256.79

Step by Step Solution

1. Step 1: Write the proportion equation
   2,251.47 : 3,106.89 = 1,256.79 : x
2. Step 2: Convert to fraction form
   2,251.47/3,106.89 = 1,256.79/x
3. Step 3: Cross multiply
   2,251.47x = 3,106.89 × 1,256.79
4. Step 4: Simplify right side
   2,251.47x = 3,904,708.28
5. Step 5: Solve for x
   x = 3,904,708.28/2,251.47
6. Step 6: Final answer
   x = 1,734.29