Finding the Fourth Proportional to 21,993.45, 30,361.42 and 14,738.05

Step by Step Solution

1. Step 1: Write the proportion equation
   21,993.45 : 30,361.42 = 14,738.05 : x
2. Step 2: Convert to fraction form
   21,993.45/30,361.42 = 14,738.05/x
3. Step 3: Cross multiply
   21,993.45x = 30,361.42 × 14,738.05
4. Step 4: Simplify right side
   21,993.45x = 447,468,126.03
5. Step 5: Solve for x
   x = 447,468,126.03/21,993.45
6. Step 6: Final answer
   x = 20,345.52