Finding the Fourth Proportional to 2,680.49, 4,017.87 and 1,120.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,680.49 : 4,017.87 = 1,120.10 : x
2. Step 2: Convert to fraction form
   2,680.49/4,017.87 = 1,120.10/x
3. Step 3: Cross multiply
   2,680.49x = 4,017.87 × 1,120.10
4. Step 4: Simplify right side
   2,680.49x = 4,500,396.10
5. Step 5: Solve for x
   x = 4,500,396.10/2,680.49
6. Step 6: Final answer
   x = 1,678.94