Finding the Fourth Proportional to 80,588.42, 111,165.69 and 50,321.20

Step by Step Solution

1. Step 1: Write the proportion equation
   80,588.42 : 111,165.69 = 50,321.20 : x
2. Step 2: Convert to fraction form
   80,588.42/111,165.69 = 50,321.20/x
3. Step 3: Cross multiply
   80,588.42x = 111,165.69 × 50,321.20
4. Step 4: Simplify right side
   80,588.42x = 5,593,990,919.63
5. Step 5: Solve for x
   x = 5,593,990,919.63/80,588.42
6. Step 6: Final answer
   x = 69,414.33