Finding the Fourth Proportional to 144,078.01, 198,819.56 and 80,419.91

Step by Step Solution

1. Step 1: Write the proportion equation
   144,078.01 : 198,819.56 = 80,419.91 : x
2. Step 2: Convert to fraction form
   144,078.01/198,819.56 = 80,419.91/x
3. Step 3: Cross multiply
   144,078.01x = 198,819.56 × 80,419.91
4. Step 4: Simplify right side
   144,078.01x = 15,989,050,328.39
5. Step 5: Solve for x
   x = 15,989,050,328.39/144,078.01
6. Step 6: Final answer
   x = 110,974.95