Finding the Fourth Proportional to 21,421.38, 29,574.46 and 13,982.34

Step by Step Solution

1. Step 1: Write the proportion equation
   21,421.38 : 29,574.46 = 13,982.34 : x
2. Step 2: Convert to fraction form
   21,421.38/29,574.46 = 13,982.34/x
3. Step 3: Cross multiply
   21,421.38x = 29,574.46 × 13,982.34
4. Step 4: Simplify right side
   21,421.38x = 413,520,155.04
5. Step 5: Solve for x
   x = 413,520,155.04/21,421.38
6. Step 6: Final answer
   x = 19,304.09