Finding the Fourth Proportional to 2,150.28, 2,967.42 and 1,218.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,150.28 : 2,967.42 = 1,218.78 : x
2. Step 2: Convert to fraction form
   2,150.28/2,967.42 = 1,218.78/x
3. Step 3: Cross multiply
   2,150.28x = 2,967.42 × 1,218.78
4. Step 4: Simplify right side
   2,150.28x = 3,616,632.15
5. Step 5: Solve for x
   x = 3,616,632.15/2,150.28
6. Step 6: Final answer
   x = 1,681.94