Finding the Fourth Proportional to 21,536.46, 29,723.02 and 12,105

Step by Step Solution

1. Step 1: Write the proportion equation
   21,536.46 : 29,723.02 = 12,105 : x
2. Step 2: Convert to fraction form
   21,536.46/29,723.02 = 12,105/x
3. Step 3: Cross multiply
   21,536.46x = 29,723.02 × 12,105
4. Step 4: Simplify right side
   21,536.46x = 359,797,126.84
5. Step 5: Solve for x
   x = 359,797,126.84/21,536.46
6. Step 6: Final answer
   x = 16,706.42