Finding the Fourth Proportional to 11,936.72, 17,911.38 and 8,676.80

Step by Step Solution

1. Step 1: Write the proportion equation
   11,936.72 : 17,911.38 = 8,676.80 : x
2. Step 2: Convert to fraction form
   11,936.72/17,911.38 = 8,676.80/x
3. Step 3: Cross multiply
   11,936.72x = 17,911.38 × 8,676.80
4. Step 4: Simplify right side
   11,936.72x = 155,413,461.98
5. Step 5: Solve for x
   x = 155,413,461.98/11,936.72
6. Step 6: Final answer
   x = 13,019.78