Finding the Fourth Proportional to 21,724.56, 29,981.52 and 12,294.54

Step by Step Solution

1. Step 1: Write the proportion equation
   21,724.56 : 29,981.52 = 12,294.54 : x
2. Step 2: Convert to fraction form
   21,724.56/29,981.52 = 12,294.54/x
3. Step 3: Cross multiply
   21,724.56x = 29,981.52 × 12,294.54
4. Step 4: Simplify right side
   21,724.56x = 368,608,996.90
5. Step 5: Solve for x
   x = 368,608,996.90/21,724.56
6. Step 6: Final answer
   x = 16,967.39