Finding the Fourth Proportional to 3,162.72, 4,743.56 and 854.40

Step by Step Solution

1. Step 1: Write the proportion equation
   3,162.72 : 4,743.56 = 854.40 : x
2. Step 2: Convert to fraction form
   3,162.72/4,743.56 = 854.40/x
3. Step 3: Cross multiply
   3,162.72x = 4,743.56 × 854.40
4. Step 4: Simplify right side
   3,162.72x = 4,052,897.66
5. Step 5: Solve for x
   x = 4,052,897.66/3,162.72
6. Step 6: Final answer
   x = 1,281.46