Finding the Fourth Proportional to 21,694.69, 29,938.89 and 12,745.09

Step by Step Solution

1. Step 1: Write the proportion equation
   21,694.69 : 29,938.89 = 12,745.09 : x
2. Step 2: Convert to fraction form
   21,694.69/29,938.89 = 12,745.09/x
3. Step 3: Cross multiply
   21,694.69x = 29,938.89 × 12,745.09
4. Step 4: Simplify right side
   21,694.69x = 381,573,847.55
5. Step 5: Solve for x
   x = 381,573,847.55/21,694.69
6. Step 6: Final answer
   x = 17,588.35