Finding the Fourth Proportional to 2,568.42, 3,853 and 902.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,568.42 : 3,853 = 902.30 : x
2. Step 2: Convert to fraction form
   2,568.42/3,853 = 902.30/x
3. Step 3: Cross multiply
   2,568.42x = 3,853 × 902.30
4. Step 4: Simplify right side
   2,568.42x = 3,476,561.90
5. Step 5: Solve for x
   x = 3,476,561.90/2,568.42
6. Step 6: Final answer
   x = 1,353.58