Finding the Fourth Proportional to 2,288.21, 3,433.48 and 902.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,288.21 : 3,433.48 = 902.55 : x
2. Step 2: Convert to fraction form
   2,288.21/3,433.48 = 902.55/x
3. Step 3: Cross multiply
   2,288.21x = 3,433.48 × 902.55
4. Step 4: Simplify right side
   2,288.21x = 3,098,874.28
5. Step 5: Solve for x
   x = 3,098,874.28/2,288.21
6. Step 6: Final answer
   x = 1,354.28