Finding the Fourth Proportional to 21,935.12, 30,257.46 and 13,441.05

Step by Step Solution

1. Step 1: Write the proportion equation
   21,935.12 : 30,257.46 = 13,441.05 : x
2. Step 2: Convert to fraction form
   21,935.12/30,257.46 = 13,441.05/x
3. Step 3: Cross multiply
   21,935.12x = 30,257.46 × 13,441.05
4. Step 4: Simplify right side
   21,935.12x = 406,692,032.73
5. Step 5: Solve for x
   x = 406,692,032.73/21,935.12
6. Step 6: Final answer
   x = 18,540.68