Finding the Fourth Proportional to 105,831.97, 158,664.72 and 72,450.86

Step by Step Solution

1. Step 1: Write the proportion equation
   105,831.97 : 158,664.72 = 72,450.86 : x
2. Step 2: Convert to fraction form
   105,831.97/158,664.72 = 72,450.86/x
3. Step 3: Cross multiply
   105,831.97x = 158,664.72 × 72,450.86
4. Step 4: Simplify right side
   105,831.97x = 11,495,394,894.03
5. Step 5: Solve for x
   x = 11,495,394,894.03/105,831.97
6. Step 6: Final answer
   x = 108,619.31