Finding the Fourth Proportional to 1,076.59, 1,614.69 and 685.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,076.59 : 1,614.69 = 685.43 : x
2. Step 2: Convert to fraction form
   1,076.59/1,614.69 = 685.43/x
3. Step 3: Cross multiply
   1,076.59x = 1,614.69 × 685.43
4. Step 4: Simplify right side
   1,076.59x = 1,106,745.47
5. Step 5: Solve for x
   x = 1,106,745.47/1,076.59
6. Step 6: Final answer
   x = 1,028.01