Finding the Fourth Proportional to 21,724.14, 29,978.46 and 12,292.50

Step by Step Solution

1. Step 1: Write the proportion equation
   21,724.14 : 29,978.46 = 12,292.50 : x
2. Step 2: Convert to fraction form
   21,724.14/29,978.46 = 12,292.50/x
3. Step 3: Cross multiply
   21,724.14x = 29,978.46 × 12,292.50
4. Step 4: Simplify right side
   21,724.14x = 368,510,219.55
5. Step 5: Solve for x
   x = 368,510,219.55/21,724.14
6. Step 6: Final answer
   x = 16,963.17