Finding the Fourth Proportional to 8,495.78, 12,794.56 and 7,738.25

Step by Step Solution

1. Step 1: Write the proportion equation
   8,495.78 : 12,794.56 = 7,738.25 : x
2. Step 2: Convert to fraction form
   8,495.78/12,794.56 = 7,738.25/x
3. Step 3: Cross multiply
   8,495.78x = 12,794.56 × 7,738.25
4. Step 4: Simplify right side
   8,495.78x = 99,007,420.60
5. Step 5: Solve for x
   x = 99,007,420.60/8,495.78
6. Step 6: Final answer
   x = 11,653.72