Finding the Fourth Proportional to 2,016.72, 3,025.84 and 1,042.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,016.72 : 3,025.84 = 1,042.20 : x
2. Step 2: Convert to fraction form
   2,016.72/3,025.84 = 1,042.20/x
3. Step 3: Cross multiply
   2,016.72x = 3,025.84 × 1,042.20
4. Step 4: Simplify right side
   2,016.72x = 3,153,530.45
5. Step 5: Solve for x
   x = 3,153,530.45/2,016.72
6. Step 6: Final answer
   x = 1,563.69