Finding the Fourth Proportional to 21,800.03, 30,076.31 and 14,250.72

Step by Step Solution

1. Step 1: Write the proportion equation
   21,800.03 : 30,076.31 = 14,250.72 : x
2. Step 2: Convert to fraction form
   21,800.03/30,076.31 = 14,250.72/x
3. Step 3: Cross multiply
   21,800.03x = 30,076.31 × 14,250.72
4. Step 4: Simplify right side
   21,800.03x = 428,609,072.44
5. Step 5: Solve for x
   x = 428,609,072.44/21,800.03
6. Step 6: Final answer
   x = 19,660.94