Finding the Fourth Proportional to 22,072.72, 30,464.68 and 12,647.60

Step by Step Solution

1. Step 1: Write the proportion equation
   22,072.72 : 30,464.68 = 12,647.60 : x
2. Step 2: Convert to fraction form
   22,072.72/30,464.68 = 12,647.60/x
3. Step 3: Cross multiply
   22,072.72x = 30,464.68 × 12,647.60
4. Step 4: Simplify right side
   22,072.72x = 385,305,086.77
5. Step 5: Solve for x
   x = 385,305,086.77/22,072.72
6. Step 6: Final answer
   x = 17,456.17