Finding the Fourth Proportional to 8,290.78, 12,435.77 and 3,096.25

Step by Step Solution

1. Step 1: Write the proportion equation
   8,290.78 : 12,435.77 = 3,096.25 : x
2. Step 2: Convert to fraction form
   8,290.78/12,435.77 = 3,096.25/x
3. Step 3: Cross multiply
   8,290.78x = 12,435.77 × 3,096.25
4. Step 4: Simplify right side
   8,290.78x = 38,504,237.38
5. Step 5: Solve for x
   x = 38,504,237.38/8,290.78
6. Step 6: Final answer
   x = 4,644.22