Finding the Fourth Proportional to 21,611.72, 29,826.96 and 12,183.32

Step by Step Solution

1. Step 1: Write the proportion equation
   21,611.72 : 29,826.96 = 12,183.32 : x
2. Step 2: Convert to fraction form
   21,611.72/29,826.96 = 12,183.32/x
3. Step 3: Cross multiply
   21,611.72x = 29,826.96 × 12,183.32
4. Step 4: Simplify right side
   21,611.72x = 363,391,398.31
5. Step 5: Solve for x
   x = 363,391,398.31/21,611.72
6. Step 6: Final answer
   x = 16,814.55