Finding the Fourth Proportional to 2,815.34, 4,218.37 and 965.43

Step by Step Solution

1. Step 1: Write the proportion equation
   2,815.34 : 4,218.37 = 965.43 : x
2. Step 2: Convert to fraction form
   2,815.34/4,218.37 = 965.43/x
3. Step 3: Cross multiply
   2,815.34x = 4,218.37 × 965.43
4. Step 4: Simplify right side
   2,815.34x = 4,072,538.54
5. Step 5: Solve for x
   x = 4,072,538.54/2,815.34
6. Step 6: Final answer
   x = 1,446.56