Finding the Fourth Proportional to 2,388.59, 3,582.18 and 828.53

Step by Step Solution

1. Step 1: Write the proportion equation
   2,388.59 : 3,582.18 = 828.53 : x
2. Step 2: Convert to fraction form
   2,388.59/3,582.18 = 828.53/x
3. Step 3: Cross multiply
   2,388.59x = 3,582.18 × 828.53
4. Step 4: Simplify right side
   2,388.59x = 2,967,925.68
5. Step 5: Solve for x
   x = 2,967,925.68/2,388.59
6. Step 6: Final answer
   x = 1,242.55