Finding the Fourth Proportional to 21,552.61, 32,286.89 and 12,164.23

Step by Step Solution

1. Step 1: Write the proportion equation
   21,552.61 : 32,286.89 = 12,164.23 : x
2. Step 2: Convert to fraction form
   21,552.61/32,286.89 = 12,164.23/x
3. Step 3: Cross multiply
   21,552.61x = 32,286.89 × 12,164.23
4. Step 4: Simplify right side
   21,552.61x = 392,745,014.41
5. Step 5: Solve for x
   x = 392,745,014.41/21,552.61
6. Step 6: Final answer
   x = 18,222.62