Finding the Fourth Proportional to 8,219.37, 12,336.38 and 3,839.30

Step by Step Solution

1. Step 1: Write the proportion equation
   8,219.37 : 12,336.38 = 3,839.30 : x
2. Step 2: Convert to fraction form
   8,219.37/12,336.38 = 3,839.30/x
3. Step 3: Cross multiply
   8,219.37x = 12,336.38 × 3,839.30
4. Step 4: Simplify right side
   8,219.37x = 47,362,982.86
5. Step 5: Solve for x
   x = 47,362,982.86/8,219.37
6. Step 6: Final answer
   x = 5,762.36