Finding the Fourth Proportional to 2,627.88, 3,938.94 and 1,257

Step by Step Solution

1. Step 1: Write the proportion equation
   2,627.88 : 3,938.94 = 1,257 : x
2. Step 2: Convert to fraction form
   2,627.88/3,938.94 = 1,257/x
3. Step 3: Cross multiply
   2,627.88x = 3,938.94 × 1,257
4. Step 4: Simplify right side
   2,627.88x = 4,951,247.58
5. Step 5: Solve for x
   x = 4,951,247.58/2,627.88
6. Step 6: Final answer
   x = 1,884.12