Finding the Fourth Proportional to 2,057.27, 2,838.32 and 1,218.24

Step by Step Solution

1. Step 1: Write the proportion equation
   2,057.27 : 2,838.32 = 1,218.24 : x
2. Step 2: Convert to fraction form
   2,057.27/2,838.32 = 1,218.24/x
3. Step 3: Cross multiply
   2,057.27x = 2,838.32 × 1,218.24
4. Step 4: Simplify right side
   2,057.27x = 3,457,760.29
5. Step 5: Solve for x
   x = 3,457,760.29/2,057.27
6. Step 6: Final answer
   x = 1,680.76