Finding the Fourth Proportional to 8,291.72, 12,438.78 and 2,447.56

Step by Step Solution

1. Step 1: Write the proportion equation
   8,291.72 : 12,438.78 = 2,447.56 : x
2. Step 2: Convert to fraction form
   8,291.72/12,438.78 = 2,447.56/x
3. Step 3: Cross multiply
   8,291.72x = 12,438.78 × 2,447.56
4. Step 4: Simplify right side
   8,291.72x = 30,444,660.38
5. Step 5: Solve for x
   x = 30,444,660.38/8,291.72
6. Step 6: Final answer
   x = 3,671.69