Finding the Fourth Proportional to 11,105.98, 16,650.72 and 6,722.40

Step by Step Solution

1. Step 1: Write the proportion equation
   11,105.98 : 16,650.72 = 6,722.40 : x
2. Step 2: Convert to fraction form
   11,105.98/16,650.72 = 6,722.40/x
3. Step 3: Cross multiply
   11,105.98x = 16,650.72 × 6,722.40
4. Step 4: Simplify right side
   11,105.98x = 111,932,800.13
5. Step 5: Solve for x
   x = 111,932,800.13/11,105.98
6. Step 6: Final answer
   x = 10,078.61