Finding the Fourth Proportional to 21,696.45, 29,942.42 and 12,265.01

Step by Step Solution

1. Step 1: Write the proportion equation
   21,696.45 : 29,942.42 = 12,265.01 : x
2. Step 2: Convert to fraction form
   21,696.45/29,942.42 = 12,265.01/x
3. Step 3: Cross multiply
   21,696.45x = 29,942.42 × 12,265.01
4. Step 4: Simplify right side
   21,696.45x = 367,244,080.72
5. Step 5: Solve for x
   x = 367,244,080.72/21,696.45
6. Step 6: Final answer
   x = 16,926.46