Finding the Fourth Proportional to 11,908.52, 16,429.72 and 7,717.60

Step by Step Solution

1. Step 1: Write the proportion equation
   11,908.52 : 16,429.72 = 7,717.60 : x
2. Step 2: Convert to fraction form
   11,908.52/16,429.72 = 7,717.60/x
3. Step 3: Cross multiply
   11,908.52x = 16,429.72 × 7,717.60
4. Step 4: Simplify right side
   11,908.52x = 126,798,007.07
5. Step 5: Solve for x
   x = 126,798,007.07/11,908.52
6. Step 6: Final answer
   x = 10,647.67