Finding the Fourth Proportional to 2,215.29, 3,057.12 and 1,684.65

Step by Step Solution

1. Step 1: Write the proportion equation
   2,215.29 : 3,057.12 = 1,684.65 : x
2. Step 2: Convert to fraction form
   2,215.29/3,057.12 = 1,684.65/x
3. Step 3: Cross multiply
   2,215.29x = 3,057.12 × 1,684.65
4. Step 4: Simplify right side
   2,215.29x = 5,150,177.21
5. Step 5: Solve for x
   x = 5,150,177.21/2,215.29
6. Step 6: Final answer
   x = 2,324.83