Finding the Fourth Proportional to 12,227.49, 18,352.78 and 7,847.42

Step by Step Solution

1. Step 1: Write the proportion equation
   12,227.49 : 18,352.78 = 7,847.42 : x
2. Step 2: Convert to fraction form
   12,227.49/18,352.78 = 7,847.42/x
3. Step 3: Cross multiply
   12,227.49x = 18,352.78 × 7,847.42
4. Step 4: Simplify right side
   12,227.49x = 144,021,861.45
5. Step 5: Solve for x
   x = 144,021,861.45/12,227.49
6. Step 6: Final answer
   x = 11,778.53