Finding the Fourth Proportional to 11,949.05, 16,489.59 and 6,643.82

Step by Step Solution

1. Step 1: Write the proportion equation
   11,949.05 : 16,489.59 = 6,643.82 : x
2. Step 2: Convert to fraction form
   11,949.05/16,489.59 = 6,643.82/x
3. Step 3: Cross multiply
   11,949.05x = 16,489.59 × 6,643.82
4. Step 4: Simplify right side
   11,949.05x = 109,553,867.83
5. Step 5: Solve for x
   x = 109,553,867.83/11,949.05
6. Step 6: Final answer
   x = 9,168.42