Finding the Fourth Proportional to 21,540.24, 29,722.16 and 12,106.96

Step by Step Solution

1. Step 1: Write the proportion equation
   21,540.24 : 29,722.16 = 12,106.96 : x
2. Step 2: Convert to fraction form
   21,540.24/29,722.16 = 12,106.96/x
3. Step 3: Cross multiply
   21,540.24x = 29,722.16 × 12,106.96
4. Step 4: Simplify right side
   21,540.24x = 359,845,002.23
5. Step 5: Solve for x
   x = 359,845,002.23/21,540.24
6. Step 6: Final answer
   x = 16,705.71