Finding the Fourth Proportional to 2,042.20, 2,852.60 and 2,042.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,042.20 : 2,852.60 = 2,042.20 : x
2. Step 2: Convert to fraction form
   2,042.20/2,852.60 = 2,042.20/x
3. Step 3: Cross multiply
   2,042.20x = 2,852.60 × 2,042.20
4. Step 4: Simplify right side
   2,042.20x = 5,825,579.72
5. Step 5: Solve for x
   x = 5,825,579.72/2,042.20
6. Step 6: Final answer
   x = 2,852.60