Finding the Fourth Proportional to 21,818, 30,109.16 and 11,882

Step by Step Solution

1. Step 1: Write the proportion equation
   21,818 : 30,109.16 = 11,882 : x
2. Step 2: Convert to fraction form
   21,818/30,109.16 = 11,882/x
3. Step 3: Cross multiply
   21,818x = 30,109.16 × 11,882
4. Step 4: Simplify right side
   21,818x = 357,757,039.12
5. Step 5: Solve for x
   x = 357,757,039.12/21,818
6. Step 6: Final answer
   x = 16,397.33