Finding the Fourth Proportional to 22,359.25, 30,855.77 and 12,928.42

Step by Step Solution

1. Step 1: Write the proportion equation
   22,359.25 : 30,855.77 = 12,928.42 : x
2. Step 2: Convert to fraction form
   22,359.25/30,855.77 = 12,928.42/x
3. Step 3: Cross multiply
   22,359.25x = 30,855.77 × 12,928.42
4. Step 4: Simplify right side
   22,359.25x = 398,916,353.98
5. Step 5: Solve for x
   x = 398,916,353.98/22,359.25
6. Step 6: Final answer
   x = 17,841.22