Finding the Fourth Proportional to 81,015.22, 111,771.48 and 50,386.30

Step by Step Solution

1. Step 1: Write the proportion equation
   81,015.22 : 111,771.48 = 50,386.30 : x
2. Step 2: Convert to fraction form
   81,015.22/111,771.48 = 50,386.30/x
3. Step 3: Cross multiply
   81,015.22x = 111,771.48 × 50,386.30
4. Step 4: Simplify right side
   81,015.22x = 5,631,751,322.72
5. Step 5: Solve for x
   x = 5,631,751,322.72/81,015.22
6. Step 6: Final answer
   x = 69,514.73