Finding the Fourth Proportional to 105,908.24, 146,072.38 and 71,942.91

Step by Step Solution

1. Step 1: Write the proportion equation
   105,908.24 : 146,072.38 = 71,942.91 : x
2. Step 2: Convert to fraction form
   105,908.24/146,072.38 = 71,942.91/x
3. Step 3: Cross multiply
   105,908.24x = 146,072.38 × 71,942.91
4. Step 4: Simplify right side
   105,908.24x = 10,508,872,087.83
5. Step 5: Solve for x
   x = 10,508,872,087.83/105,908.24
6. Step 6: Final answer
   x = 99,226.20