Finding the Fourth Proportional to 263,638, 363,821.72 and 144,406

Step by Step Solution

1. Step 1: Write the proportion equation
   263,638 : 363,821.72 = 144,406 : x
2. Step 2: Convert to fraction form
   263,638/363,821.72 = 144,406/x
3. Step 3: Cross multiply
   263,638x = 363,821.72 × 144,406
4. Step 4: Simplify right side
   263,638x = 52,538,039,298.32
5. Step 5: Solve for x
   x = 52,538,039,298.32/263,638
6. Step 6: Final answer
   x = 199,280.98