Finding the Fourth Proportional to 21,680.27, 32,493.78 and 12,328.11

Step by Step Solution

1. Step 1: Write the proportion equation
   21,680.27 : 32,493.78 = 12,328.11 : x
2. Step 2: Convert to fraction form
   21,680.27/32,493.78 = 12,328.11/x
3. Step 3: Cross multiply
   21,680.27x = 32,493.78 × 12,328.11
4. Step 4: Simplify right side
   21,680.27x = 400,587,016.01
5. Step 5: Solve for x
   x = 400,587,016.01/21,680.27
6. Step 6: Final answer
   x = 18,477.03