Finding the Fourth Proportional to 2,453.33, 3,679.20 and 809.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,453.33 : 3,679.20 = 809.48 : x
2. Step 2: Convert to fraction form
   2,453.33/3,679.20 = 809.48/x
3. Step 3: Cross multiply
   2,453.33x = 3,679.20 × 809.48
4. Step 4: Simplify right side
   2,453.33x = 2,978,238.82
5. Step 5: Solve for x
   x = 2,978,238.82/2,453.33
6. Step 6: Final answer
   x = 1,213.96