Finding the Fourth Proportional to 2,188.20, 3,019.83 and 1,243.97

Step by Step Solution

1. Step 1: Write the proportion equation
   2,188.20 : 3,019.83 = 1,243.97 : x
2. Step 2: Convert to fraction form
   2,188.20/3,019.83 = 1,243.97/x
3. Step 3: Cross multiply
   2,188.20x = 3,019.83 × 1,243.97
4. Step 4: Simplify right side
   2,188.20x = 3,756,577.93
5. Step 5: Solve for x
   x = 3,756,577.93/2,188.20
6. Step 6: Final answer
   x = 1,716.74