Finding the Fourth Proportional to 105,905.24, 146,068.25 and 71,939.91

Step by Step Solution

1. Step 1: Write the proportion equation
   105,905.24 : 146,068.25 = 71,939.91 : x
2. Step 2: Convert to fraction form
   105,905.24/146,068.25 = 71,939.91/x
3. Step 3: Cross multiply
   105,905.24x = 146,068.25 × 71,939.91
4. Step 4: Simplify right side
   105,905.24x = 10,508,136,946.91
5. Step 5: Solve for x
   x = 10,508,136,946.91/105,905.24
6. Step 6: Final answer
   x = 99,222.07