Finding the Fourth Proportional to 1,443.67, 1,992.87 and 919.73

Step by Step Solution

1. Step 1: Write the proportion equation
   1,443.67 : 1,992.87 = 919.73 : x
2. Step 2: Convert to fraction form
   1,443.67/1,992.87 = 919.73/x
3. Step 3: Cross multiply
   1,443.67x = 1,992.87 × 919.73
4. Step 4: Simplify right side
   1,443.67x = 1,832,907.31
5. Step 5: Solve for x
   x = 1,832,907.31/1,443.67
6. Step 6: Final answer
   x = 1,269.62