Finding the Fourth Proportional to 21,538.36, 32,297.82 and 8,380.72

Step by Step Solution

1. Step 1: Write the proportion equation
   21,538.36 : 32,297.82 = 8,380.72 : x
2. Step 2: Convert to fraction form
   21,538.36/32,297.82 = 8,380.72/x
3. Step 3: Cross multiply
   21,538.36x = 32,297.82 × 8,380.72
4. Step 4: Simplify right side
   21,538.36x = 270,678,986.03
5. Step 5: Solve for x
   x = 270,678,986.03/21,538.36
6. Step 6: Final answer
   x = 12,567.30