Finding the Fourth Proportional to 11,716.56, 16,162.80 and 7,939.92

Step by Step Solution

1. Step 1: Write the proportion equation
   11,716.56 : 16,162.80 = 7,939.92 : x
2. Step 2: Convert to fraction form
   11,716.56/16,162.80 = 7,939.92/x
3. Step 3: Cross multiply
   11,716.56x = 16,162.80 × 7,939.92
4. Step 4: Simplify right side
   11,716.56x = 128,331,338.98
5. Step 5: Solve for x
   x = 128,331,338.98/11,716.56
6. Step 6: Final answer
   x = 10,952.99