Finding the Fourth Proportional to 1,597.78, 2,396.79 and 443.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,597.78 : 2,396.79 = 443.50 : x
2. Step 2: Convert to fraction form
   1,597.78/2,396.79 = 443.50/x
3. Step 3: Cross multiply
   1,597.78x = 2,396.79 × 443.50
4. Step 4: Simplify right side
   1,597.78x = 1,062,976.37
5. Step 5: Solve for x
   x = 1,062,976.37/1,597.78
6. Step 6: Final answer
   x = 665.28