Finding the Fourth Proportional to 1,425.83, 1,967.90 and 828.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,425.83 : 1,967.90 = 828.27 : x
2. Step 2: Convert to fraction form
   1,425.83/1,967.90 = 828.27/x
3. Step 3: Cross multiply
   1,425.83x = 1,967.90 × 828.27
4. Step 4: Simplify right side
   1,425.83x = 1,629,948.39
5. Step 5: Solve for x
   x = 1,629,948.39/1,425.83
6. Step 6: Final answer
   x = 1,143.16