Finding the Fourth Proportional to 21,892.01, 30,205.41 and 13,391.02

Step by Step Solution

1. Step 1: Write the proportion equation
   21,892.01 : 30,205.41 = 13,391.02 : x
2. Step 2: Convert to fraction form
   21,892.01/30,205.41 = 13,391.02/x
3. Step 3: Cross multiply
   21,892.01x = 30,205.41 × 13,391.02
4. Step 4: Simplify right side
   21,892.01x = 404,481,236.96
5. Step 5: Solve for x
   x = 404,481,236.96/21,892.01
6. Step 6: Final answer
   x = 18,476.21