Finding the Fourth Proportional to 144,137.69, 198,917.56 and 80,471.69

Step by Step Solution

1. Step 1: Write the proportion equation
   144,137.69 : 198,917.56 = 80,471.69 : x
2. Step 2: Convert to fraction form
   144,137.69/198,917.56 = 80,471.69/x
3. Step 3: Cross multiply
   144,137.69x = 198,917.56 × 80,471.69
4. Step 4: Simplify right side
   144,137.69x = 16,007,232,075.82
5. Step 5: Solve for x
   x = 16,007,232,075.82/144,137.69
6. Step 6: Final answer
   x = 111,055.15