Finding the Fourth Proportional to 1,659.34, 2,488.92 and 685.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,659.34 : 2,488.92 = 685.42 : x
2. Step 2: Convert to fraction form
   1,659.34/2,488.92 = 685.42/x
3. Step 3: Cross multiply
   1,659.34x = 2,488.92 × 685.42
4. Step 4: Simplify right side
   1,659.34x = 1,705,955.55
5. Step 5: Solve for x
   x = 1,705,955.55/1,659.34
6. Step 6: Final answer
   x = 1,028.09