Finding the Fourth Proportional to 1,228.72, 1,841.46 and 902.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,228.72 : 1,841.46 = 902.56 : x
2. Step 2: Convert to fraction form
   1,228.72/1,841.46 = 902.56/x
3. Step 3: Cross multiply
   1,228.72x = 1,841.46 × 902.56
4. Step 4: Simplify right side
   1,228.72x = 1,662,028.14
5. Step 5: Solve for x
   x = 1,662,028.14/1,228.72
6. Step 6: Final answer
   x = 1,352.65