Finding the Fourth Proportional to 12,225.38, 18,339.05 and 3,906.57

Step by Step Solution

1. Step 1: Write the proportion equation
   12,225.38 : 18,339.05 = 3,906.57 : x
2. Step 2: Convert to fraction form
   12,225.38/18,339.05 = 3,906.57/x
3. Step 3: Cross multiply
   12,225.38x = 18,339.05 × 3,906.57
4. Step 4: Simplify right side
   12,225.38x = 71,642,782.56
5. Step 5: Solve for x
   x = 71,642,782.56/12,225.38
6. Step 6: Final answer
   x = 5,860.17