Finding the Fourth Proportional to 1,408.91, 1,944.18 and 779.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,408.91 : 1,944.18 = 779.42 : x
2. Step 2: Convert to fraction form
   1,408.91/1,944.18 = 779.42/x
3. Step 3: Cross multiply
   1,408.91x = 1,944.18 × 779.42
4. Step 4: Simplify right side
   1,408.91x = 1,515,339.58
5. Step 5: Solve for x
   x = 1,515,339.58/1,408.91
6. Step 6: Final answer
   x = 1,075.54