Finding the Fourth Proportional to 144,300.45, 199,134.05 and 80,638.23

Step by Step Solution

1. Step 1: Write the proportion equation
   144,300.45 : 199,134.05 = 80,638.23 : x
2. Step 2: Convert to fraction form
   144,300.45/199,134.05 = 80,638.23/x
3. Step 3: Cross multiply
   144,300.45x = 199,134.05 × 80,638.23
4. Step 4: Simplify right side
   144,300.45x = 16,057,816,921.54
5. Step 5: Solve for x
   x = 16,057,816,921.54/144,300.45
6. Step 6: Final answer
   x = 111,280.44