Finding the Fourth Proportional to 11,947.25, 16,491.78 and 7,966.91

Step by Step Solution

1. Step 1: Write the proportion equation
   11,947.25 : 16,491.78 = 7,966.91 : x
2. Step 2: Convert to fraction form
   11,947.25/16,491.78 = 7,966.91/x
3. Step 3: Cross multiply
   11,947.25x = 16,491.78 × 7,966.91
4. Step 4: Simplify right side
   11,947.25x = 131,388,568.23
5. Step 5: Solve for x
   x = 131,388,568.23/11,947.25
6. Step 6: Final answer
   x = 10,997.39