Finding the Fourth Proportional to 144,300.88, 199,131.50 and 80,639.20

Step by Step Solution

1. Step 1: Write the proportion equation
   144,300.88 : 199,131.50 = 80,639.20 : x
2. Step 2: Convert to fraction form
   144,300.88/199,131.50 = 80,639.20/x
3. Step 3: Cross multiply
   144,300.88x = 199,131.50 × 80,639.20
4. Step 4: Simplify right side
   144,300.88x = 16,057,804,854.80
5. Step 5: Solve for x
   x = 16,057,804,854.80/144,300.88
6. Step 6: Final answer
   x = 111,280.02