Finding the Fourth Proportional to 81,085, 111,865.96 and 50,857.96

Step by Step Solution

1. Step 1: Write the proportion equation
   81,085 : 111,865.96 = 50,857.96 : x
2. Step 2: Convert to fraction form
   81,085/111,865.96 = 50,857.96/x
3. Step 3: Cross multiply
   81,085x = 111,865.96 × 50,857.96
4. Step 4: Simplify right side
   81,085x = 5,689,274,519.04
5. Step 5: Solve for x
   x = 5,689,274,519.04/81,085
6. Step 6: Final answer
   x = 70,164.33