Finding the Fourth Proportional to 8,499.60, 12,747.78 and 4,115.07

Step by Step Solution

1. Step 1: Write the proportion equation
   8,499.60 : 12,747.78 = 4,115.07 : x
2. Step 2: Convert to fraction form
   8,499.60/12,747.78 = 4,115.07/x
3. Step 3: Cross multiply
   8,499.60x = 12,747.78 × 4,115.07
4. Step 4: Simplify right side
   8,499.60x = 52,458,007.04
5. Step 5: Solve for x
   x = 52,458,007.04/8,499.60
6. Step 6: Final answer
   x = 6,171.82