Finding the Fourth Proportional to 11,639.94, 16,059.16 and 7,665.10

Step by Step Solution

1. Step 1: Write the proportion equation
   11,639.94 : 16,059.16 = 7,665.10 : x
2. Step 2: Convert to fraction form
   11,639.94/16,059.16 = 7,665.10/x
3. Step 3: Cross multiply
   11,639.94x = 16,059.16 × 7,665.10
4. Step 4: Simplify right side
   11,639.94x = 123,095,067.32
5. Step 5: Solve for x
   x = 123,095,067.32/11,639.94
6. Step 6: Final answer
   x = 10,575.23