Finding the Fourth Proportional to 8,919.09, 12,308.58 and 4,940.55

Step by Step Solution

1. Step 1: Write the proportion equation
   8,919.09 : 12,308.58 = 4,940.55 : x
2. Step 2: Convert to fraction form
   8,919.09/12,308.58 = 4,940.55/x
3. Step 3: Cross multiply
   8,919.09x = 12,308.58 × 4,940.55
4. Step 4: Simplify right side
   8,919.09x = 60,811,154.92
5. Step 5: Solve for x
   x = 60,811,154.92/8,919.09
6. Step 6: Final answer
   x = 6,818.09