Finding the Fourth Proportional to 12,225.94, 18,338.50 and 3,906.43

Step by Step Solution

1. Step 1: Write the proportion equation
   12,225.94 : 18,338.50 = 3,906.43 : x
2. Step 2: Convert to fraction form
   12,225.94/18,338.50 = 3,906.43/x
3. Step 3: Cross multiply
   12,225.94x = 18,338.50 × 3,906.43
4. Step 4: Simplify right side
   12,225.94x = 71,638,025.59
5. Step 5: Solve for x
   x = 71,638,025.59/12,225.94
6. Step 6: Final answer
   x = 5,859.51