Finding the Fourth Proportional to 80,716.38, 111,443.46 and 50,513.90

Step by Step Solution

1. Step 1: Write the proportion equation
   80,716.38 : 111,443.46 = 50,513.90 : x
2. Step 2: Convert to fraction form
   80,716.38/111,443.46 = 50,513.90/x
3. Step 3: Cross multiply
   80,716.38x = 111,443.46 × 50,513.90
4. Step 4: Simplify right side
   80,716.38x = 5,629,443,794.09
5. Step 5: Solve for x
   x = 5,629,443,794.09/80,716.38
6. Step 6: Final answer
   x = 69,743.51