Finding the Fourth Proportional to 21,962.78, 30,308.78 and 12,272.24

Step by Step Solution

1. Step 1: Write the proportion equation
   21,962.78 : 30,308.78 = 12,272.24 : x
2. Step 2: Convert to fraction form
   21,962.78/30,308.78 = 12,272.24/x
3. Step 3: Cross multiply
   21,962.78x = 30,308.78 × 12,272.24
4. Step 4: Simplify right side
   21,962.78x = 371,956,728.72
5. Step 5: Solve for x
   x = 371,956,728.72/21,962.78
6. Step 6: Final answer
   x = 16,935.78