Finding the Fourth Proportional to 105,530.82, 158,295.92 and 81,550.02

Step by Step Solution

1. Step 1: Write the proportion equation
   105,530.82 : 158,295.92 = 81,550.02 : x
2. Step 2: Convert to fraction form
   105,530.82/158,295.92 = 81,550.02/x
3. Step 3: Cross multiply
   105,530.82x = 158,295.92 × 81,550.02
4. Step 4: Simplify right side
   105,530.82x = 12,909,035,034.17
5. Step 5: Solve for x
   x = 12,909,035,034.17/105,530.82
6. Step 6: Final answer
   x = 122,324.79