Finding the Fourth Proportional to 1,216.34, 1,674.78 and 1,019.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,216.34 : 1,674.78 = 1,019.42 : x
2. Step 2: Convert to fraction form
   1,216.34/1,674.78 = 1,019.42/x
3. Step 3: Cross multiply
   1,216.34x = 1,674.78 × 1,019.42
4. Step 4: Simplify right side
   1,216.34x = 1,707,304.23
5. Step 5: Solve for x
   x = 1,707,304.23/1,216.34
6. Step 6: Final answer
   x = 1,403.64