Finding the Fourth Proportional to 6,689.49, 9,231.30 and 3,705.30

Step by Step Solution

1. Step 1: Write the proportion equation
   6,689.49 : 9,231.30 = 3,705.30 : x
2. Step 2: Convert to fraction form
   6,689.49/9,231.30 = 3,705.30/x
3. Step 3: Cross multiply
   6,689.49x = 9,231.30 × 3,705.30
4. Step 4: Simplify right side
   6,689.49x = 34,204,735.89
5. Step 5: Solve for x
   x = 34,204,735.89/6,689.49
6. Step 6: Final answer
   x = 5,113.21