Finding the Fourth Proportional to 21,083.90, 29,093.36 and 13,016.10

Step by Step Solution

1. Step 1: Write the proportion equation
   21,083.90 : 29,093.36 = 13,016.10 : x
2. Step 2: Convert to fraction form
   21,083.90/29,093.36 = 13,016.10/x
3. Step 3: Cross multiply
   21,083.90x = 29,093.36 × 13,016.10
4. Step 4: Simplify right side
   21,083.90x = 378,682,083.10
5. Step 5: Solve for x
   x = 378,682,083.10/21,083.90
6. Step 6: Final answer
   x = 17,960.72