Finding the Fourth Proportional to 21,784.42, 30,062.85 and 12,226.42

Step by Step Solution

1. Step 1: Write the proportion equation
   21,784.42 : 30,062.85 = 12,226.42 : x
2. Step 2: Convert to fraction form
   21,784.42/30,062.85 = 12,226.42/x
3. Step 3: Cross multiply
   21,784.42x = 30,062.85 × 12,226.42
4. Step 4: Simplify right side
   21,784.42x = 367,561,030.50
5. Step 5: Solve for x
   x = 367,561,030.50/21,784.42
6. Step 6: Final answer
   x = 16,872.66