Finding the Fourth Proportional to 144,306.20, 199,141.98 and 80,643.98

Step by Step Solution

1. Step 1: Write the proportion equation
   144,306.20 : 199,141.98 = 80,643.98 : x
2. Step 2: Convert to fraction form
   144,306.20/199,141.98 = 80,643.98/x
3. Step 3: Cross multiply
   144,306.20x = 199,141.98 × 80,643.98
4. Step 4: Simplify right side
   144,306.20x = 16,059,601,852.28
5. Step 5: Solve for x
   x = 16,059,601,852.28/144,306.20
6. Step 6: Final answer
   x = 111,288.37