Finding the Fourth Proportional to 8,286.78, 12,429.77 and 3,092.25

Step by Step Solution

1. Step 1: Write the proportion equation
   8,286.78 : 12,429.77 = 3,092.25 : x
2. Step 2: Convert to fraction form
   8,286.78/12,429.77 = 3,092.25/x
3. Step 3: Cross multiply
   8,286.78x = 12,429.77 × 3,092.25
4. Step 4: Simplify right side
   8,286.78x = 38,435,940.82
5. Step 5: Solve for x
   x = 38,435,940.82/8,286.78
6. Step 6: Final answer
   x = 4,638.22