Finding the Fourth Proportional to 2,427.56, 3,638.73 and 1,256.38

Step by Step Solution

1. Step 1: Write the proportion equation
   2,427.56 : 3,638.73 = 1,256.38 : x
2. Step 2: Convert to fraction form
   2,427.56/3,638.73 = 1,256.38/x
3. Step 3: Cross multiply
   2,427.56x = 3,638.73 × 1,256.38
4. Step 4: Simplify right side
   2,427.56x = 4,571,627.60
5. Step 5: Solve for x
   x = 4,571,627.60/2,427.56
6. Step 6: Final answer
   x = 1,883.22