Finding the Fourth Proportional to 21,198.24, 31,806.54 and 10,105.02

Step by Step Solution

1. Step 1: Write the proportion equation
   21,198.24 : 31,806.54 = 10,105.02 : x
2. Step 2: Convert to fraction form
   21,198.24/31,806.54 = 10,105.02/x
3. Step 3: Cross multiply
   21,198.24x = 31,806.54 × 10,105.02
4. Step 4: Simplify right side
   21,198.24x = 321,405,722.83
5. Step 5: Solve for x
   x = 321,405,722.83/21,198.24
6. Step 6: Final answer
   x = 15,161.91