Finding the Fourth Proportional to 2,568.70, 3,605.90 and 2,568.70

Step by Step Solution

1. Step 1: Write the proportion equation
   2,568.70 : 3,605.90 = 2,568.70 : x
2. Step 2: Convert to fraction form
   2,568.70/3,605.90 = 2,568.70/x
3. Step 3: Cross multiply
   2,568.70x = 3,605.90 × 2,568.70
4. Step 4: Simplify right side
   2,568.70x = 9,262,475.33
5. Step 5: Solve for x
   x = 9,262,475.33/2,568.70
6. Step 6: Final answer
   x = 3,605.90