Finding the Fourth Proportional to 11,651.49, 16,081.74 and 7,115.72

Step by Step Solution

1. Step 1: Write the proportion equation
   11,651.49 : 16,081.74 = 7,115.72 : x
2. Step 2: Convert to fraction form
   11,651.49/16,081.74 = 7,115.72/x
3. Step 3: Cross multiply
   11,651.49x = 16,081.74 × 7,115.72
4. Step 4: Simplify right side
   11,651.49x = 114,433,078.54
5. Step 5: Solve for x
   x = 114,433,078.54/11,651.49
6. Step 6: Final answer
   x = 9,821.33