Finding the Fourth Proportional to 2,187.56, 3,019.19 and 1,243.77

Step by Step Solution

1. Step 1: Write the proportion equation
   2,187.56 : 3,019.19 = 1,243.77 : x
2. Step 2: Convert to fraction form
   2,187.56/3,019.19 = 1,243.77/x
3. Step 3: Cross multiply
   2,187.56x = 3,019.19 × 1,243.77
4. Step 4: Simplify right side
   2,187.56x = 3,755,171.73
5. Step 5: Solve for x
   x = 3,755,171.73/2,187.56
6. Step 6: Final answer
   x = 1,716.61