Finding the Fourth Proportional to 11,697.28, 16,146.64 and 7,939.89

Step by Step Solution

1. Step 1: Write the proportion equation
   11,697.28 : 16,146.64 = 7,939.89 : x
2. Step 2: Convert to fraction form
   11,697.28/16,146.64 = 7,939.89/x
3. Step 3: Cross multiply
   11,697.28x = 16,146.64 × 7,939.89
4. Step 4: Simplify right side
   11,697.28x = 128,202,555.39
5. Step 5: Solve for x
   x = 128,202,555.39/11,697.28
6. Step 6: Final answer
   x = 10,960.03