Finding the Fourth Proportional to 2,445.40, 3,665.46 and 906.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,445.40 : 3,665.46 = 906.28 : x
2. Step 2: Convert to fraction form
   2,445.40/3,665.46 = 906.28/x
3. Step 3: Cross multiply
   2,445.40x = 3,665.46 × 906.28
4. Step 4: Simplify right side
   2,445.40x = 3,321,933.09
5. Step 5: Solve for x
   x = 3,321,933.09/2,445.40
6. Step 6: Final answer
   x = 1,358.44