Finding the Fourth Proportional to 22,408.78, 30,928.96 and 12,850.22

Step by Step Solution

1. Step 1: Write the proportion equation
   22,408.78 : 30,928.96 = 12,850.22 : x
2. Step 2: Convert to fraction form
   22,408.78/30,928.96 = 12,850.22/x
3. Step 3: Cross multiply
   22,408.78x = 30,928.96 × 12,850.22
4. Step 4: Simplify right side
   22,408.78x = 397,443,982.91
5. Step 5: Solve for x
   x = 397,443,982.91/22,408.78
6. Step 6: Final answer
   x = 17,736.09