Finding the Fourth Proportional to 105,906.24, 146,069.62 and 71,940.91

Step by Step Solution

1. Step 1: Write the proportion equation
   105,906.24 : 146,069.62 = 71,940.91 : x
2. Step 2: Convert to fraction form
   105,906.24/146,069.62 = 71,940.91/x
3. Step 3: Cross multiply
   105,906.24x = 146,069.62 × 71,940.91
4. Step 4: Simplify right side
   105,906.24x = 10,508,381,386.15
5. Step 5: Solve for x
   x = 10,508,381,386.15/105,906.24
6. Step 6: Final answer
   x = 99,223.44