Finding the Fourth Proportional to 21,892.44, 30,206.01 and 13,391.47

Step by Step Solution

1. Step 1: Write the proportion equation
   21,892.44 : 30,206.01 = 13,391.47 : x
2. Step 2: Convert to fraction form
   21,892.44/30,206.01 = 13,391.47/x
3. Step 3: Cross multiply
   21,892.44x = 30,206.01 × 13,391.47
4. Step 4: Simplify right side
   21,892.44x = 404,502,876.73
5. Step 5: Solve for x
   x = 404,502,876.73/21,892.44
6. Step 6: Final answer
   x = 18,476.83