Finding the Fourth Proportional to 2,688.42, 3,711.82 and 1,680.54

Step by Step Solution

1. Step 1: Write the proportion equation
   2,688.42 : 3,711.82 = 1,680.54 : x
2. Step 2: Convert to fraction form
   2,688.42/3,711.82 = 1,680.54/x
3. Step 3: Cross multiply
   2,688.42x = 3,711.82 × 1,680.54
4. Step 4: Simplify right side
   2,688.42x = 6,237,861.98
5. Step 5: Solve for x
   x = 6,237,861.98/2,688.42
6. Step 6: Final answer
   x = 2,320.27