Finding the Fourth Proportional to 21,540.89, 29,723.21 and 12,107.63

Step by Step Solution

1. Step 1: Write the proportion equation
   21,540.89 : 29,723.21 = 12,107.63 : x
2. Step 2: Convert to fraction form
   21,540.89/29,723.21 = 12,107.63/x
3. Step 3: Cross multiply
   21,540.89x = 29,723.21 × 12,107.63
4. Step 4: Simplify right side
   21,540.89x = 359,877,419.94
5. Step 5: Solve for x
   x = 359,877,419.94/21,540.89
6. Step 6: Final answer
   x = 16,706.71