Finding the Fourth Proportional to 2,162.42, 2,983.96 and 1,217.91

Step by Step Solution

1. Step 1: Write the proportion equation
   2,162.42 : 2,983.96 = 1,217.91 : x
2. Step 2: Convert to fraction form
   2,162.42/2,983.96 = 1,217.91/x
3. Step 3: Cross multiply
   2,162.42x = 2,983.96 × 1,217.91
4. Step 4: Simplify right side
   2,162.42x = 3,634,194.72
5. Step 5: Solve for x
   x = 3,634,194.72/2,162.42
6. Step 6: Final answer
   x = 1,680.61