Finding the Fourth Proportional to 2,388.72, 3,582.72 and 828.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,388.72 : 3,582.72 = 828.96 : x
2. Step 2: Convert to fraction form
   2,388.72/3,582.72 = 828.96/x
3. Step 3: Cross multiply
   2,388.72x = 3,582.72 × 828.96
4. Step 4: Simplify right side
   2,388.72x = 2,969,931.57
5. Step 5: Solve for x
   x = 2,969,931.57/2,388.72
6. Step 6: Final answer
   x = 1,243.32