Finding the Fourth Proportional to 21,908.82, 30,234.15 and 11,972.82

Step by Step Solution

1. Step 1: Write the proportion equation
   21,908.82 : 30,234.15 = 11,972.82 : x
2. Step 2: Convert to fraction form
   21,908.82/30,234.15 = 11,972.82/x
3. Step 3: Cross multiply
   21,908.82x = 30,234.15 × 11,972.82
4. Step 4: Simplify right side
   21,908.82x = 361,988,035.80
5. Step 5: Solve for x
   x = 361,988,035.80/21,908.82
6. Step 6: Final answer
   x = 16,522.48