Finding the Fourth Proportional to 3,086.67, 4,259.61 and 1,689.42

Step by Step Solution

1. Step 1: Write the proportion equation
   3,086.67 : 4,259.61 = 1,689.42 : x
2. Step 2: Convert to fraction form
   3,086.67/4,259.61 = 1,689.42/x
3. Step 3: Cross multiply
   3,086.67x = 4,259.61 × 1,689.42
4. Step 4: Simplify right side
   3,086.67x = 7,196,270.33
5. Step 5: Solve for x
   x = 7,196,270.33/3,086.67
6. Step 6: Final answer
   x = 2,331.40