Finding the Fourth Proportional to 2,114.28, 2,917.82 and 1,218.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,114.28 : 2,917.82 = 1,218.16 : x
2. Step 2: Convert to fraction form
   2,114.28/2,917.82 = 1,218.16/x
3. Step 3: Cross multiply
   2,114.28x = 2,917.82 × 1,218.16
4. Step 4: Simplify right side
   2,114.28x = 3,554,350.93
5. Step 5: Solve for x
   x = 3,554,350.93/2,114.28
6. Step 6: Final answer
   x = 1,681.12