Finding the Fourth Proportional to 21,495.47, 32,213.89 and 8,161.33

Step by Step Solution

1. Step 1: Write the proportion equation
   21,495.47 : 32,213.89 = 8,161.33 : x
2. Step 2: Convert to fraction form
   21,495.47/32,213.89 = 8,161.33/x
3. Step 3: Cross multiply
   21,495.47x = 32,213.89 × 8,161.33
4. Step 4: Simplify right side
   21,495.47x = 262,908,137.38
5. Step 5: Solve for x
   x = 262,908,137.38/21,495.47
6. Step 6: Final answer
   x = 12,230.86