Finding the Fourth Proportional to 2,680.50, 4,019.02 and 1,120.09

Step by Step Solution

1. Step 1: Write the proportion equation
   2,680.50 : 4,019.02 = 1,120.09 : x
2. Step 2: Convert to fraction form
   2,680.50/4,019.02 = 1,120.09/x
3. Step 3: Cross multiply
   2,680.50x = 4,019.02 × 1,120.09
4. Step 4: Simplify right side
   2,680.50x = 4,501,664.11
5. Step 5: Solve for x
   x = 4,501,664.11/2,680.50
6. Step 6: Final answer
   x = 1,679.41