Finding the Fourth Proportional to 105,940.71, 146,087.96 and 79,040.61

Step by Step Solution

1. Step 1: Write the proportion equation
   105,940.71 : 146,087.96 = 79,040.61 : x
2. Step 2: Convert to fraction form
   105,940.71/146,087.96 = 79,040.61/x
3. Step 3: Cross multiply
   105,940.71x = 146,087.96 × 79,040.61
4. Step 4: Simplify right side
   105,940.71x = 11,546,881,076.85
5. Step 5: Solve for x
   x = 11,546,881,076.85/105,940.71
6. Step 6: Final answer
   x = 108,993.80