Finding the Fourth Proportional to 2,680.10, 4,020.12 and 1,198.93

Step by Step Solution

1. Step 1: Write the proportion equation
   2,680.10 : 4,020.12 = 1,198.93 : x
2. Step 2: Convert to fraction form
   2,680.10/4,020.12 = 1,198.93/x
3. Step 3: Cross multiply
   2,680.10x = 4,020.12 × 1,198.93
4. Step 4: Simplify right side
   2,680.10x = 4,819,849.52
5. Step 5: Solve for x
   x = 4,819,849.52/2,680.10
6. Step 6: Final answer
   x = 1,798.38