Finding the Fourth Proportional to 2,289.79, 3,436.04 and 828.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,289.79 : 3,436.04 = 828.82 : x
2. Step 2: Convert to fraction form
   2,289.79/3,436.04 = 828.82/x
3. Step 3: Cross multiply
   2,289.79x = 3,436.04 × 828.82
4. Step 4: Simplify right side
   2,289.79x = 2,847,852.15
5. Step 5: Solve for x
   x = 2,847,852.15/2,289.79
6. Step 6: Final answer
   x = 1,243.72