Finding the Fourth Proportional to 11,171.16, 16,767.54 and 8,513.82

Step by Step Solution

1. Step 1: Write the proportion equation
   11,171.16 : 16,767.54 = 8,513.82 : x
2. Step 2: Convert to fraction form
   11,171.16/16,767.54 = 8,513.82/x
3. Step 3: Cross multiply
   11,171.16x = 16,767.54 × 8,513.82
4. Step 4: Simplify right side
   11,171.16x = 142,755,817.40
5. Step 5: Solve for x
   x = 142,755,817.40/11,171.16
6. Step 6: Final answer
   x = 12,778.96