Finding the Fourth Proportional to 80,453.31, 111,047.10 and 50,220.42

Step by Step Solution

1. Step 1: Write the proportion equation
   80,453.31 : 111,047.10 = 50,220.42 : x
2. Step 2: Convert to fraction form
   80,453.31/111,047.10 = 50,220.42/x
3. Step 3: Cross multiply
   80,453.31x = 111,047.10 × 50,220.42
4. Step 4: Simplify right side
   80,453.31x = 5,576,832,001.78
5. Step 5: Solve for x
   x = 5,576,832,001.78/80,453.31
6. Step 6: Final answer
   x = 69,317.62