Finding the Fourth Proportional to 2,162.33, 2,983.80 and 1,218.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,162.33 : 2,983.80 = 1,218.10 : x
2. Step 2: Convert to fraction form
   2,162.33/2,983.80 = 1,218.10/x
3. Step 3: Cross multiply
   2,162.33x = 2,983.80 × 1,218.10
4. Step 4: Simplify right side
   2,162.33x = 3,634,566.78
5. Step 5: Solve for x
   x = 3,634,566.78/2,162.33
6. Step 6: Final answer
   x = 1,680.86