Finding the Fourth Proportional to 2,251.31, 3,106.87 and 1,256.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,251.31 : 3,106.87 = 1,256.56 : x
2. Step 2: Convert to fraction form
   2,251.31/3,106.87 = 1,256.56/x
3. Step 3: Cross multiply
   2,251.31x = 3,106.87 × 1,256.56
4. Step 4: Simplify right side
   2,251.31x = 3,903,970.05
5. Step 5: Solve for x
   x = 3,903,970.05/2,251.31
6. Step 6: Final answer
   x = 1,734.09