Finding the Fourth Proportional to 22,286.72, 30,756.01 and 12,215.08

Step by Step Solution

1. Step 1: Write the proportion equation
   22,286.72 : 30,756.01 = 12,215.08 : x
2. Step 2: Convert to fraction form
   22,286.72/30,756.01 = 12,215.08/x
3. Step 3: Cross multiply
   22,286.72x = 30,756.01 × 12,215.08
4. Step 4: Simplify right side
   22,286.72x = 375,687,122.63
5. Step 5: Solve for x
   x = 375,687,122.63/22,286.72
6. Step 6: Final answer
   x = 16,856.99