Finding the Fourth Proportional to 1,044.87, 1,564.56 and 678.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,044.87 : 1,564.56 = 678.54 : x
2. Step 2: Convert to fraction form
   1,044.87/1,564.56 = 678.54/x
3. Step 3: Cross multiply
   1,044.87x = 1,564.56 × 678.54
4. Step 4: Simplify right side
   1,044.87x = 1,061,616.54
5. Step 5: Solve for x
   x = 1,061,616.54/1,044.87
6. Step 6: Final answer
   x = 1,016.03