Finding the Fourth Proportional to 22,286.89, 30,756.27 and 12,216.30

Step by Step Solution

1. Step 1: Write the proportion equation
   22,286.89 : 30,756.27 = 12,216.30 : x
2. Step 2: Convert to fraction form
   22,286.89/30,756.27 = 12,216.30/x
3. Step 3: Cross multiply
   22,286.89x = 30,756.27 × 12,216.30
4. Step 4: Simplify right side
   22,286.89x = 375,727,821.20
5. Step 5: Solve for x
   x = 375,727,821.20/22,286.89
6. Step 6: Final answer
   x = 16,858.69