Finding the Fourth Proportional to 8,917.89, 12,306.83 and 4,939.23

Step by Step Solution

1. Step 1: Write the proportion equation
   8,917.89 : 12,306.83 = 4,939.23 : x
2. Step 2: Convert to fraction form
   8,917.89/12,306.83 = 4,939.23/x
3. Step 3: Cross multiply
   8,917.89x = 12,306.83 × 4,939.23
4. Step 4: Simplify right side
   8,917.89x = 60,786,263.94
5. Step 5: Solve for x
   x = 60,786,263.94/8,917.89
6. Step 6: Final answer
   x = 6,816.22