Finding the Fourth Proportional to 2,688.49, 3,709.46 and 1,568.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,688.49 : 3,709.46 = 1,568.78 : x
2. Step 2: Convert to fraction form
   2,688.49/3,709.46 = 1,568.78/x
3. Step 3: Cross multiply
   2,688.49x = 3,709.46 × 1,568.78
4. Step 4: Simplify right side
   2,688.49x = 5,819,341.76
5. Step 5: Solve for x
   x = 5,819,341.76/2,688.49
6. Step 6: Final answer
   x = 2,164.54