Finding the Fourth Proportional to 144,571, 199,631.12 and 90,945.76

Step by Step Solution

1. Step 1: Write the proportion equation
   144,571 : 199,631.12 = 90,945.76 : x
2. Step 2: Convert to fraction form
   144,571/199,631.12 = 90,945.76/x
3. Step 3: Cross multiply
   144,571x = 199,631.12 × 90,945.76
4. Step 4: Simplify right side
   144,571x = 18,155,603,928.05
5. Step 5: Solve for x
   x = 18,155,603,928.05/144,571
6. Step 6: Final answer
   x = 125,582.61