Finding the Fourth Proportional to 80,711.37, 111,436.56 and 50,508.90

Step by Step Solution

1. Step 1: Write the proportion equation
   80,711.37 : 111,436.56 = 50,508.90 : x
2. Step 2: Convert to fraction form
   80,711.37/111,436.56 = 50,508.90/x
3. Step 3: Cross multiply
   80,711.37x = 111,436.56 × 50,508.90
4. Step 4: Simplify right side
   80,711.37x = 5,628,538,065.38
5. Step 5: Solve for x
   x = 5,628,538,065.38/80,711.37
6. Step 6: Final answer
   x = 69,736.62