Finding the Fourth Proportional to 21,848, 30,150.24 and 11,912

Step by Step Solution

1. Step 1: Write the proportion equation
   21,848 : 30,150.24 = 11,912 : x
2. Step 2: Convert to fraction form
   21,848/30,150.24 = 11,912/x
3. Step 3: Cross multiply
   21,848x = 30,150.24 × 11,912
4. Step 4: Simplify right side
   21,848x = 359,149,658.88
5. Step 5: Solve for x
   x = 359,149,658.88/21,848
6. Step 6: Final answer
   x = 16,438.56