Finding the Fourth Proportional to 144,639.82, 199,623.89 and 80,981.72

Step by Step Solution

1. Step 1: Write the proportion equation
   144,639.82 : 199,623.89 = 80,981.72 : x
2. Step 2: Convert to fraction form
   144,639.82/199,623.89 = 80,981.72/x
3. Step 3: Cross multiply
   144,639.82x = 199,623.89 × 80,981.72
4. Step 4: Simplify right side
   144,639.82x = 16,165,885,918.22
5. Step 5: Solve for x
   x = 16,165,885,918.22/144,639.82
6. Step 6: Final answer
   x = 111,766.50