Finding the Fourth Proportional to 8,286.69, 12,428.23 and 2,738.72

Step by Step Solution

1. Step 1: Write the proportion equation
   8,286.69 : 12,428.23 = 2,738.72 : x
2. Step 2: Convert to fraction form
   8,286.69/12,428.23 = 2,738.72/x
3. Step 3: Cross multiply
   8,286.69x = 12,428.23 × 2,738.72
4. Step 4: Simplify right side
   8,286.69x = 34,037,442.07
5. Step 5: Solve for x
   x = 34,037,442.07/8,286.69
6. Step 6: Final answer
   x = 4,107.48