Finding the Fourth Proportional to 1,425.96, 1,967.82 and 828.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,425.96 : 1,967.82 = 828.54 : x
2. Step 2: Convert to fraction form
   1,425.96/1,967.82 = 828.54/x
3. Step 3: Cross multiply
   1,425.96x = 1,967.82 × 828.54
4. Step 4: Simplify right side
   1,425.96x = 1,630,417.58
5. Step 5: Solve for x
   x = 1,630,417.58/1,425.96
6. Step 6: Final answer
   x = 1,143.38