Finding the Fourth Proportional to 2,120.36, 3,179.18 and 1,022.54

Step by Step Solution

1. Step 1: Write the proportion equation
   2,120.36 : 3,179.18 = 1,022.54 : x
2. Step 2: Convert to fraction form
   2,120.36/3,179.18 = 1,022.54/x
3. Step 3: Cross multiply
   2,120.36x = 3,179.18 × 1,022.54
4. Step 4: Simplify right side
   2,120.36x = 3,250,838.72
5. Step 5: Solve for x
   x = 3,250,838.72/2,120.36
6. Step 6: Final answer
   x = 1,533.15