Finding the Fourth Proportional to 2,162.09, 2,983.43 and 1,217.81

Step by Step Solution

1. Step 1: Write the proportion equation
   2,162.09 : 2,983.43 = 1,217.81 : x
2. Step 2: Convert to fraction form
   2,162.09/2,983.43 = 1,217.81/x
3. Step 3: Cross multiply
   2,162.09x = 2,983.43 × 1,217.81
4. Step 4: Simplify right side
   2,162.09x = 3,633,229.88
5. Step 5: Solve for x
   x = 3,633,229.88/2,162.09
6. Step 6: Final answer
   x = 1,680.43