Finding the Fourth Proportional to 3,086.50, 4,259.46 and 1,689.34

Step by Step Solution

1. Step 1: Write the proportion equation
   3,086.50 : 4,259.46 = 1,689.34 : x
2. Step 2: Convert to fraction form
   3,086.50/4,259.46 = 1,689.34/x
3. Step 3: Cross multiply
   3,086.50x = 4,259.46 × 1,689.34
4. Step 4: Simplify right side
   3,086.50x = 7,195,676.16
5. Step 5: Solve for x
   x = 7,195,676.16/3,086.50
6. Step 6: Final answer
   x = 2,331.34