Finding the Fourth Proportional to 21,016.24, 29,015.92 and 13,069.28

Step by Step Solution

1. Step 1: Write the proportion equation
   21,016.24 : 29,015.92 = 13,069.28 : x
2. Step 2: Convert to fraction form
   21,016.24/29,015.92 = 13,069.28/x
3. Step 3: Cross multiply
   21,016.24x = 29,015.92 × 13,069.28
4. Step 4: Simplify right side
   21,016.24x = 379,217,182.94
5. Step 5: Solve for x
   x = 379,217,182.94/21,016.24
6. Step 6: Final answer
   x = 18,044.01