Finding the Fourth Proportional to 2,627.46, 3,938.31 and 1,239.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,627.46 : 3,938.31 = 1,239.69 : x
2. Step 2: Convert to fraction form
   2,627.46/3,938.31 = 1,239.69/x
3. Step 3: Cross multiply
   2,627.46x = 3,938.31 × 1,239.69
4. Step 4: Simplify right side
   2,627.46x = 4,882,283.52
5. Step 5: Solve for x
   x = 4,882,283.52/2,627.46
6. Step 6: Final answer
   x = 1,858.18