Finding the Fourth Proportional to 80,906.10, 111,664.69 and 50,717.31

Step by Step Solution

1. Step 1: Write the proportion equation
   80,906.10 : 111,664.69 = 50,717.31 : x
2. Step 2: Convert to fraction form
   80,906.10/111,664.69 = 50,717.31/x
3. Step 3: Cross multiply
   80,906.10x = 111,664.69 × 50,717.31
4. Step 4: Simplify right side
   80,906.10x = 5,663,332,571.99
5. Step 5: Solve for x
   x = 5,663,332,571.99/80,906.10
6. Step 6: Final answer
   x = 69,998.83