Finding the Fourth Proportional to 1,074.57, 1,483.83 and 828.33

Step by Step Solution

1. Step 1: Write the proportion equation
   1,074.57 : 1,483.83 = 828.33 : x
2. Step 2: Convert to fraction form
   1,074.57/1,483.83 = 828.33/x
3. Step 3: Cross multiply
   1,074.57x = 1,483.83 × 828.33
4. Step 4: Simplify right side
   1,074.57x = 1,229,100.90
5. Step 5: Solve for x
   x = 1,229,100.90/1,074.57
6. Step 6: Final answer
   x = 1,143.81