Finding the Fourth Proportional to 22,086.72, 30,479.46 and 12,528.36

Step by Step Solution

1. Step 1: Write the proportion equation
   22,086.72 : 30,479.46 = 12,528.36 : x
2. Step 2: Convert to fraction form
   22,086.72/30,479.46 = 12,528.36/x
3. Step 3: Cross multiply
   22,086.72x = 30,479.46 × 12,528.36
4. Step 4: Simplify right side
   22,086.72x = 381,857,647.49
5. Step 5: Solve for x
   x = 381,857,647.49/22,086.72
6. Step 6: Final answer
   x = 17,289.02