Finding the Fourth Proportional to 2,306.55, 3,185.15 and 1,680.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,306.55 : 3,185.15 = 1,680.69 : x
2. Step 2: Convert to fraction form
   2,306.55/3,185.15 = 1,680.69/x
3. Step 3: Cross multiply
   2,306.55x = 3,185.15 × 1,680.69
4. Step 4: Simplify right side
   2,306.55x = 5,353,241.35
5. Step 5: Solve for x
   x = 5,353,241.35/2,306.55
6. Step 6: Final answer
   x = 2,320.89