Finding the Fourth Proportional to 11,016.88, 16,530.18 and 5,177.68

Step by Step Solution

1. Step 1: Write the proportion equation
   11,016.88 : 16,530.18 = 5,177.68 : x
2. Step 2: Convert to fraction form
   11,016.88/16,530.18 = 5,177.68/x
3. Step 3: Cross multiply
   11,016.88x = 16,530.18 × 5,177.68
4. Step 4: Simplify right side
   11,016.88x = 85,587,982.38
5. Step 5: Solve for x
   x = 85,587,982.38/11,016.88
6. Step 6: Final answer
   x = 7,768.80