Finding the Fourth Proportional to 144,320.80, 199,164.96 and 80,662.72

Step by Step Solution

1. Step 1: Write the proportion equation
   144,320.80 : 199,164.96 = 80,662.72 : x
2. Step 2: Convert to fraction form
   144,320.80/199,164.96 = 80,662.72/x
3. Step 3: Cross multiply
   144,320.80x = 199,164.96 × 80,662.72
4. Step 4: Simplify right side
   144,320.80x = 16,065,187,402.29
5. Step 5: Solve for x
   x = 16,065,187,402.29/144,320.80
6. Step 6: Final answer
   x = 111,315.81