Finding the Fourth Proportional to 1,443.53, 1,992.07 and 919.87

Step by Step Solution

1. Step 1: Write the proportion equation
   1,443.53 : 1,992.07 = 919.87 : x
2. Step 2: Convert to fraction form
   1,443.53/1,992.07 = 919.87/x
3. Step 3: Cross multiply
   1,443.53x = 1,992.07 × 919.87
4. Step 4: Simplify right side
   1,443.53x = 1,832,445.43
5. Step 5: Solve for x
   x = 1,832,445.43/1,443.53
6. Step 6: Final answer
   x = 1,269.42