Finding the Fourth Proportional to 21,146.82, 29,183.59 and 12,074.64

Step by Step Solution

1. Step 1: Write the proportion equation
   21,146.82 : 29,183.59 = 12,074.64 : x
2. Step 2: Convert to fraction form
   21,146.82/29,183.59 = 12,074.64/x
3. Step 3: Cross multiply
   21,146.82x = 29,183.59 × 12,074.64
4. Step 4: Simplify right side
   21,146.82x = 352,381,345.05
5. Step 5: Solve for x
   x = 352,381,345.05/21,146.82
6. Step 6: Final answer
   x = 16,663.56