Finding the Fourth Proportional to 21,086.92, 29,099.82 and 11,654.74

Step by Step Solution

1. Step 1: Write the proportion equation
   21,086.92 : 29,099.82 = 11,654.74 : x
2. Step 2: Convert to fraction form
   21,086.92/29,099.82 = 11,654.74/x
3. Step 3: Cross multiply
   21,086.92x = 29,099.82 × 11,654.74
4. Step 4: Simplify right side
   21,086.92x = 339,150,836.15
5. Step 5: Solve for x
   x = 339,150,836.15/21,086.92
6. Step 6: Final answer
   x = 16,083.47