Finding the Fourth Proportional to 1,442.25, 1,989.50 and 944.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,442.25 : 1,989.50 = 944.78 : x
2. Step 2: Convert to fraction form
   1,442.25/1,989.50 = 944.78/x
3. Step 3: Cross multiply
   1,442.25x = 1,989.50 × 944.78
4. Step 4: Simplify right side
   1,442.25x = 1,879,625.14
5. Step 5: Solve for x
   x = 1,879,625.14/1,442.25
6. Step 6: Final answer
   x = 1,303.26