Finding the Fourth Proportional to 2,096.72, 3,145.72 and 1,229.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,096.72 : 3,145.72 = 1,229.20 : x
2. Step 2: Convert to fraction form
   2,096.72/3,145.72 = 1,229.20/x
3. Step 3: Cross multiply
   2,096.72x = 3,145.72 × 1,229.20
4. Step 4: Simplify right side
   2,096.72x = 3,866,719.02
5. Step 5: Solve for x
   x = 3,866,719.02/2,096.72
6. Step 6: Final answer
   x = 1,844.18