Finding the Fourth Proportional to 8,919.69, 12,309.27 and 4,940.88

Step by Step Solution

1. Step 1: Write the proportion equation
   8,919.69 : 12,309.27 = 4,940.88 : x
2. Step 2: Convert to fraction form
   8,919.69/12,309.27 = 4,940.88/x
3. Step 3: Cross multiply
   8,919.69x = 12,309.27 × 4,940.88
4. Step 4: Simplify right side
   8,919.69x = 60,818,625.96
5. Step 5: Solve for x
   x = 60,818,625.96/8,919.69
6. Step 6: Final answer
   x = 6,818.47