Finding the Fourth Proportional to 3,377.31, 5,069.61 and 2,688.42

Step by Step Solution

1. Step 1: Write the proportion equation
   3,377.31 : 5,069.61 = 2,688.42 : x
2. Step 2: Convert to fraction form
   3,377.31/5,069.61 = 2,688.42/x
3. Step 3: Cross multiply
   3,377.31x = 5,069.61 × 2,688.42
4. Step 4: Simplify right side
   3,377.31x = 13,629,240.92
5. Step 5: Solve for x
   x = 13,629,240.92/3,377.31
6. Step 6: Final answer
   x = 4,035.53