Finding the Fourth Proportional to 1,910.82, 2,867.56 and 678.22

Step by Step Solution

1. Step 1: Write the proportion equation
   1,910.82 : 2,867.56 = 678.22 : x
2. Step 2: Convert to fraction form
   1,910.82/2,867.56 = 678.22/x
3. Step 3: Cross multiply
   1,910.82x = 2,867.56 × 678.22
4. Step 4: Simplify right side
   1,910.82x = 1,944,836.54
5. Step 5: Solve for x
   x = 1,944,836.54/1,910.82
6. Step 6: Final answer
   x = 1,017.80