Finding the Fourth Proportional to 11,101.72, 16,657.98 and 5,251.36

Step by Step Solution

1. Step 1: Write the proportion equation
   11,101.72 : 16,657.98 = 5,251.36 : x
2. Step 2: Convert to fraction form
   11,101.72/16,657.98 = 5,251.36/x
3. Step 3: Cross multiply
   11,101.72x = 16,657.98 × 5,251.36
4. Step 4: Simplify right side
   11,101.72x = 87,477,049.85
5. Step 5: Solve for x
   x = 87,477,049.85/11,101.72
6. Step 6: Final answer
   x = 7,879.59