Finding the Fourth Proportional to 21,820, 30,111.92 and 11,884

Step by Step Solution

1. Step 1: Write the proportion equation
   21,820 : 30,111.92 = 11,884 : x
2. Step 2: Convert to fraction form
   21,820/30,111.92 = 11,884/x
3. Step 3: Cross multiply
   21,820x = 30,111.92 × 11,884
4. Step 4: Simplify right side
   21,820x = 357,850,057.28
5. Step 5: Solve for x
   x = 357,850,057.28/21,820
6. Step 6: Final answer
   x = 16,400.09