Finding the Fourth Proportional to 11,662.80, 16,083.48 and 7,679.92

Step by Step Solution

1. Step 1: Write the proportion equation
   11,662.80 : 16,083.48 = 7,679.92 : x
2. Step 2: Convert to fraction form
   11,662.80/16,083.48 = 7,679.92/x
3. Step 3: Cross multiply
   11,662.80x = 16,083.48 × 7,679.92
4. Step 4: Simplify right side
   11,662.80x = 123,519,839.72
5. Step 5: Solve for x
   x = 123,519,839.72/11,662.80
6. Step 6: Final answer
   x = 10,590.92