Finding the Fourth Proportional to 21,709.38, 29,960.33 and 12,150.36

Step by Step Solution

1. Step 1: Write the proportion equation
   21,709.38 : 29,960.33 = 12,150.36 : x
2. Step 2: Convert to fraction form
   21,709.38/29,960.33 = 12,150.36/x
3. Step 3: Cross multiply
   21,709.38x = 29,960.33 × 12,150.36
4. Step 4: Simplify right side
   21,709.38x = 364,028,846.82
5. Step 5: Solve for x
   x = 364,028,846.82/21,709.38
6. Step 6: Final answer
   x = 16,768.28