Finding the Fourth Proportional to 72,443.80, 108,519.90 and 50,282.20

Step by Step Solution

1. Step 1: Write the proportion equation
   72,443.80 : 108,519.90 = 50,282.20 : x
2. Step 2: Convert to fraction form
   72,443.80/108,519.90 = 50,282.20/x
3. Step 3: Cross multiply
   72,443.80x = 108,519.90 × 50,282.20
4. Step 4: Simplify right side
   72,443.80x = 5,456,619,315.78
5. Step 5: Solve for x
   x = 5,456,619,315.78/72,443.80
6. Step 6: Final answer
   x = 75,322.10