Finding the Fourth Proportional to 2,162.34, 2,983.77 and 1,217.79

Step by Step Solution

1. Step 1: Write the proportion equation
   2,162.34 : 2,983.77 = 1,217.79 : x
2. Step 2: Convert to fraction form
   2,162.34/2,983.77 = 1,217.79/x
3. Step 3: Cross multiply
   2,162.34x = 2,983.77 × 1,217.79
4. Step 4: Simplify right side
   2,162.34x = 3,633,605.27
5. Step 5: Solve for x
   x = 3,633,605.27/2,162.34
6. Step 6: Final answer
   x = 1,680.40