Finding the Fourth Proportional to 105,872.04, 146,171.78 and 65,628.60

Step by Step Solution

1. Step 1: Write the proportion equation
   105,872.04 : 146,171.78 = 65,628.60 : x
2. Step 2: Convert to fraction form
   105,872.04/146,171.78 = 65,628.60/x
3. Step 3: Cross multiply
   105,872.04x = 146,171.78 × 65,628.60
4. Step 4: Simplify right side
   105,872.04x = 9,593,049,280.91
5. Step 5: Solve for x
   x = 9,593,049,280.91/105,872.04
6. Step 6: Final answer
   x = 90,609.85