Finding the Fourth Proportional to 144,061.77, 198,819.06 and 80,405.49

Step by Step Solution

1. Step 1: Write the proportion equation
   144,061.77 : 198,819.06 = 80,405.49 : x
2. Step 2: Convert to fraction form
   144,061.77/198,819.06 = 80,405.49/x
3. Step 3: Cross multiply
   144,061.77x = 198,819.06 × 80,405.49
4. Step 4: Simplify right side
   144,061.77x = 15,986,143,940.64
5. Step 5: Solve for x
   x = 15,986,143,940.64/144,061.77
6. Step 6: Final answer
   x = 110,967.29