Finding the Fourth Proportional to 21,899.42, 30,221.22 and 12,467.98

Step by Step Solution

1. Step 1: Write the proportion equation
   21,899.42 : 30,221.22 = 12,467.98 : x
2. Step 2: Convert to fraction form
   21,899.42/30,221.22 = 12,467.98/x
3. Step 3: Cross multiply
   21,899.42x = 30,221.22 × 12,467.98
4. Step 4: Simplify right side
   21,899.42x = 376,797,566.54
5. Step 5: Solve for x
   x = 376,797,566.54/21,899.42
6. Step 6: Final answer
   x = 17,205.82