Finding the Fourth Proportional to 3,404.44, 5,106.52 and 939.20

Step by Step Solution

1. Step 1: Write the proportion equation
   3,404.44 : 5,106.52 = 939.20 : x
2. Step 2: Convert to fraction form
   3,404.44/5,106.52 = 939.20/x
3. Step 3: Cross multiply
   3,404.44x = 5,106.52 × 939.20
4. Step 4: Simplify right side
   3,404.44x = 4,796,016.58
5. Step 5: Solve for x
   x = 4,796,016.58/3,404.44
6. Step 6: Final answer
   x = 1,408.75