Finding the Fourth Proportional to 2,162.28, 2,984.10 and 1,218.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,162.28 : 2,984.10 = 1,218.16 : x
2. Step 2: Convert to fraction form
   2,162.28/2,984.10 = 1,218.16/x
3. Step 3: Cross multiply
   2,162.28x = 2,984.10 × 1,218.16
4. Step 4: Simplify right side
   2,162.28x = 3,635,111.26
5. Step 5: Solve for x
   x = 3,635,111.26/2,162.28
6. Step 6: Final answer
   x = 1,681.15