Finding the Fourth Proportional to 21,800.82, 30,077.40 and 14,251.50

Step by Step Solution

1. Step 1: Write the proportion equation
   21,800.82 : 30,077.40 = 14,251.50 : x
2. Step 2: Convert to fraction form
   21,800.82/30,077.40 = 14,251.50/x
3. Step 3: Cross multiply
   21,800.82x = 30,077.40 × 14,251.50
4. Step 4: Simplify right side
   21,800.82x = 428,648,066.10
5. Step 5: Solve for x
   x = 428,648,066.10/21,800.82
6. Step 6: Final answer
   x = 19,662.02