Finding the Fourth Proportional to 2,042.40, 2,759.40 and 2,042.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,042.40 : 2,759.40 = 2,042.40 : x
2. Step 2: Convert to fraction form
   2,042.40/2,759.40 = 2,042.40/x
3. Step 3: Cross multiply
   2,042.40x = 2,759.40 × 2,042.40
4. Step 4: Simplify right side
   2,042.40x = 5,635,798.56
5. Step 5: Solve for x
   x = 5,635,798.56/2,042.40
6. Step 6: Final answer
   x = 2,759.40