Finding the Fourth Proportional to 81,056.19, 111,859.43 and 50,842.79

Step by Step Solution

1. Step 1: Write the proportion equation
   81,056.19 : 111,859.43 = 50,842.79 : x
2. Step 2: Convert to fraction form
   81,056.19/111,859.43 = 50,842.79/x
3. Step 3: Cross multiply
   81,056.19x = 111,859.43 × 50,842.79
4. Step 4: Simplify right side
   81,056.19x = 5,687,245,076.82
5. Step 5: Solve for x
   x = 5,687,245,076.82/81,056.19
6. Step 6: Final answer
   x = 70,164.23