Finding the Fourth Proportional to 144,719.69, 199,710.83 and 81,057.29

Step by Step Solution

1. Step 1: Write the proportion equation
   144,719.69 : 199,710.83 = 81,057.29 : x
2. Step 2: Convert to fraction form
   144,719.69/199,710.83 = 81,057.29/x
3. Step 3: Cross multiply
   144,719.69x = 199,710.83 × 81,057.29
4. Step 4: Simplify right side
   144,719.69x = 16,188,017,867.54
5. Step 5: Solve for x
   x = 16,188,017,867.54/144,719.69
6. Step 6: Final answer
   x = 111,857.75