Finding the Fourth Proportional to 2,015.89, 2,782.10 and 1,219.33

Step by Step Solution

1. Step 1: Write the proportion equation
   2,015.89 : 2,782.10 = 1,219.33 : x
2. Step 2: Convert to fraction form
   2,015.89/2,782.10 = 1,219.33/x
3. Step 3: Cross multiply
   2,015.89x = 2,782.10 × 1,219.33
4. Step 4: Simplify right side
   2,015.89x = 3,392,297.99
5. Step 5: Solve for x
   x = 3,392,297.99/2,015.89
6. Step 6: Final answer
   x = 1,682.78