Finding the Fourth Proportional to 8,928.23, 12,320.78 and 4,949.10

Step by Step Solution

1. Step 1: Write the proportion equation
   8,928.23 : 12,320.78 = 4,949.10 : x
2. Step 2: Convert to fraction form
   8,928.23/12,320.78 = 4,949.10/x
3. Step 3: Cross multiply
   8,928.23x = 12,320.78 × 4,949.10
4. Step 4: Simplify right side
   8,928.23x = 60,976,747.55
5. Step 5: Solve for x
   x = 60,976,747.55/8,928.23
6. Step 6: Final answer
   x = 6,829.66