Finding the Fourth Proportional to 21,301.92, 29,398.83 and 12,806.81

Step by Step Solution

1. Step 1: Write the proportion equation
   21,301.92 : 29,398.83 = 12,806.81 : x
2. Step 2: Convert to fraction form
   21,301.92/29,398.83 = 12,806.81/x
3. Step 3: Cross multiply
   21,301.92x = 29,398.83 × 12,806.81
4. Step 4: Simplify right side
   21,301.92x = 376,505,083.04
5. Step 5: Solve for x
   x = 376,505,083.04/21,301.92
6. Step 6: Final answer
   x = 17,674.70