Finding the Fourth Proportional to 21,662.52, 29,894.72 and 12,231.29

Step by Step Solution

1. Step 1: Write the proportion equation
   21,662.52 : 29,894.72 = 12,231.29 : x
2. Step 2: Convert to fraction form
   21,662.52/29,894.72 = 12,231.29/x
3. Step 3: Cross multiply
   21,662.52x = 29,894.72 × 12,231.29
4. Step 4: Simplify right side
   21,662.52x = 365,650,779.16
5. Step 5: Solve for x
   x = 365,650,779.16/21,662.52
6. Step 6: Final answer
   x = 16,879.42