Finding the Fourth Proportional to 11,966.72, 16,514.09 and 6,661.89

Step by Step Solution

1. Step 1: Write the proportion equation
   11,966.72 : 16,514.09 = 6,661.89 : x
2. Step 2: Convert to fraction form
   11,966.72/16,514.09 = 6,661.89/x
3. Step 3: Cross multiply
   11,966.72x = 16,514.09 × 6,661.89
4. Step 4: Simplify right side
   11,966.72x = 110,015,017.72
5. Step 5: Solve for x
   x = 110,015,017.72/11,966.72
6. Step 6: Final answer
   x = 9,193.42