Finding the Fourth Proportional to 11,664.91, 16,086.75 and 7,679.10

Step by Step Solution

1. Step 1: Write the proportion equation
   11,664.91 : 16,086.75 = 7,679.10 : x
2. Step 2: Convert to fraction form
   11,664.91/16,086.75 = 7,679.10/x
3. Step 3: Cross multiply
   11,664.91x = 16,086.75 × 7,679.10
4. Step 4: Simplify right side
   11,664.91x = 123,531,836.65
5. Step 5: Solve for x
   x = 123,531,836.65/11,664.91
6. Step 6: Final answer
   x = 10,590.04