Finding the Fourth Proportional to 326,156.98, 450,145.83 and 198,906.39

Step by Step Solution

1. Step 1: Write the proportion equation
   326,156.98 : 450,145.83 = 198,906.39 : x
2. Step 2: Convert to fraction form
   326,156.98/450,145.83 = 198,906.39/x
3. Step 3: Cross multiply
   326,156.98x = 450,145.83 × 198,906.39
4. Step 4: Simplify right side
   326,156.98x = 89,536,882,018.85
5. Step 5: Solve for x
   x = 89,536,882,018.85/326,156.98
6. Step 6: Final answer
   x = 274,520.82