Finding the Fourth Proportional to 2,187.69, 3,018.77 and 1,243.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,187.69 : 3,018.77 = 1,243.59 : x
2. Step 2: Convert to fraction form
   2,187.69/3,018.77 = 1,243.59/x
3. Step 3: Cross multiply
   2,187.69x = 3,018.77 × 1,243.59
4. Step 4: Simplify right side
   2,187.69x = 3,754,105.97
5. Step 5: Solve for x
   x = 3,754,105.97/2,187.69
6. Step 6: Final answer
   x = 1,716.01