Finding the Fourth Proportional to 80,711.16, 111,351.31 and 50,485

Step by Step Solution

1. Step 1: Write the proportion equation
   80,711.16 : 111,351.31 = 50,485 : x
2. Step 2: Convert to fraction form
   80,711.16/111,351.31 = 50,485/x
3. Step 3: Cross multiply
   80,711.16x = 111,351.31 × 50,485
4. Step 4: Simplify right side
   80,711.16x = 5,621,570,885.35
5. Step 5: Solve for x
   x = 5,621,570,885.35/80,711.16
6. Step 6: Final answer
   x = 69,650.48