Finding the Fourth Proportional to 81,102.72, 111,992.22 and 50,940.48

Step by Step Solution

1. Step 1: Write the proportion equation
   81,102.72 : 111,992.22 = 50,940.48 : x
2. Step 2: Convert to fraction form
   81,102.72/111,992.22 = 50,940.48/x
3. Step 3: Cross multiply
   81,102.72x = 111,992.22 × 50,940.48
4. Step 4: Simplify right side
   81,102.72x = 5,704,937,443.07
5. Step 5: Solve for x
   x = 5,704,937,443.07/81,102.72
6. Step 6: Final answer
   x = 70,342.12