Finding the Fourth Proportional to 12,447.22, 18,669.39 and 3,213.94

Step by Step Solution

1. Step 1: Write the proportion equation
   12,447.22 : 18,669.39 = 3,213.94 : x
2. Step 2: Convert to fraction form
   12,447.22/18,669.39 = 3,213.94/x
3. Step 3: Cross multiply
   12,447.22x = 18,669.39 × 3,213.94
4. Step 4: Simplify right side
   12,447.22x = 60,002,299.30
5. Step 5: Solve for x
   x = 60,002,299.30/12,447.22
6. Step 6: Final answer
   x = 4,820.54