Finding the Fourth Proportional to 2,568.84, 3,546.36 and 1,978.08

Step by Step Solution

1. Step 1: Write the proportion equation
   2,568.84 : 3,546.36 = 1,978.08 : x
2. Step 2: Convert to fraction form
   2,568.84/3,546.36 = 1,978.08/x
3. Step 3: Cross multiply
   2,568.84x = 3,546.36 × 1,978.08
4. Step 4: Simplify right side
   2,568.84x = 7,014,983.79
5. Step 5: Solve for x
   x = 7,014,983.79/2,568.84
6. Step 6: Final answer
   x = 2,730.80