Finding the Fourth Proportional to 11,640.38, 17,429.58 and 7,949.82

Step by Step Solution

1. Step 1: Write the proportion equation
   11,640.38 : 17,429.58 = 7,949.82 : x
2. Step 2: Convert to fraction form
   11,640.38/17,429.58 = 7,949.82/x
3. Step 3: Cross multiply
   11,640.38x = 17,429.58 × 7,949.82
4. Step 4: Simplify right side
   11,640.38x = 138,561,936.53
5. Step 5: Solve for x
   x = 138,561,936.53/11,640.38
6. Step 6: Final answer
   x = 11,903.56