Finding the Fourth Proportional to 144,320.72, 199,248.72 and 90,651.68

Step by Step Solution

1. Step 1: Write the proportion equation
   144,320.72 : 199,248.72 = 90,651.68 : x
2. Step 2: Convert to fraction form
   144,320.72/199,248.72 = 90,651.68/x
3. Step 3: Cross multiply
   144,320.72x = 199,248.72 × 90,651.68
4. Step 4: Simplify right side
   144,320.72x = 18,062,231,205.85
5. Step 5: Solve for x
   x = 18,062,231,205.85/144,320.72
6. Step 6: Final answer
   x = 125,153.42