Finding the Fourth Proportional to 2,142.36, 3,207.72 and 1,114.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,142.36 : 3,207.72 = 1,114.20 : x
2. Step 2: Convert to fraction form
   2,142.36/3,207.72 = 1,114.20/x
3. Step 3: Cross multiply
   2,142.36x = 3,207.72 × 1,114.20
4. Step 4: Simplify right side
   2,142.36x = 3,574,041.62
5. Step 5: Solve for x
   x = 3,574,041.62/2,142.36
6. Step 6: Final answer
   x = 1,668.27