Finding the Fourth Proportional to 21,496.50, 29,665.22 and 12,065.31

Step by Step Solution

1. Step 1: Write the proportion equation
   21,496.50 : 29,665.22 = 12,065.31 : x
2. Step 2: Convert to fraction form
   21,496.50/29,665.22 = 12,065.31/x
3. Step 3: Cross multiply
   21,496.50x = 29,665.22 × 12,065.31
4. Step 4: Simplify right side
   21,496.50x = 357,920,015.19
5. Step 5: Solve for x
   x = 357,920,015.19/21,496.50
6. Step 6: Final answer
   x = 16,650.15