Finding the Fourth Proportional to 21,768.72, 30,040.86 and 11,832.72

Step by Step Solution

1. Step 1: Write the proportion equation
   21,768.72 : 30,040.86 = 11,832.72 : x
2. Step 2: Convert to fraction form
   21,768.72/30,040.86 = 11,832.72/x
3. Step 3: Cross multiply
   21,768.72x = 30,040.86 × 11,832.72
4. Step 4: Simplify right side
   21,768.72x = 355,465,084.94
5. Step 5: Solve for x
   x = 355,465,084.94/21,768.72
6. Step 6: Final answer
   x = 16,329.17