Finding the Fourth Proportional to 2,680.71, 4,020.83 and 1,200.03

Step by Step Solution

1. Step 1: Write the proportion equation
   2,680.71 : 4,020.83 = 1,200.03 : x
2. Step 2: Convert to fraction form
   2,680.71/4,020.83 = 1,200.03/x
3. Step 3: Cross multiply
   2,680.71x = 4,020.83 × 1,200.03
4. Step 4: Simplify right side
   2,680.71x = 4,825,110.62
5. Step 5: Solve for x
   x = 4,825,110.62/2,680.71
6. Step 6: Final answer
   x = 1,799.94