Finding the Fourth Proportional to 105,518.88, 158,166.12 and 72,229.56

Step by Step Solution

1. Step 1: Write the proportion equation
   105,518.88 : 158,166.12 = 72,229.56 : x
2. Step 2: Convert to fraction form
   105,518.88/158,166.12 = 72,229.56/x
3. Step 3: Cross multiply
   105,518.88x = 158,166.12 × 72,229.56
4. Step 4: Simplify right side
   105,518.88x = 11,424,269,254.51
5. Step 5: Solve for x
   x = 11,424,269,254.51/105,518.88
6. Step 6: Final answer
   x = 108,267.54