Finding the Fourth Proportional to 89,142.73, 123,020.57 and 50,908.50

Step by Step Solution

1. Step 1: Write the proportion equation
   89,142.73 : 123,020.57 = 50,908.50 : x
2. Step 2: Convert to fraction form
   89,142.73/123,020.57 = 50,908.50/x
3. Step 3: Cross multiply
   89,142.73x = 123,020.57 × 50,908.50
4. Step 4: Simplify right side
   89,142.73x = 6,262,792,815.12
5. Step 5: Solve for x
   x = 6,262,792,815.12/89,142.73
6. Step 6: Final answer
   x = 70,255.79