Finding the Fourth Proportional to 8,920.09, 12,308.69 and 4,940.19

Step by Step Solution

1. Step 1: Write the proportion equation
   8,920.09 : 12,308.69 = 4,940.19 : x
2. Step 2: Convert to fraction form
   8,920.09/12,308.69 = 4,940.19/x
3. Step 3: Cross multiply
   8,920.09x = 12,308.69 × 4,940.19
4. Step 4: Simplify right side
   8,920.09x = 60,807,279.60
5. Step 5: Solve for x
   x = 60,807,279.60/8,920.09
6. Step 6: Final answer
   x = 6,816.89