Finding the Fourth Proportional to 1,443.52, 1,992.18 and 919.90

Step by Step Solution

1. Step 1: Write the proportion equation
   1,443.52 : 1,992.18 = 919.90 : x
2. Step 2: Convert to fraction form
   1,443.52/1,992.18 = 919.90/x
3. Step 3: Cross multiply
   1,443.52x = 1,992.18 × 919.90
4. Step 4: Simplify right side
   1,443.52x = 1,832,606.38
5. Step 5: Solve for x
   x = 1,832,606.38/1,443.52
6. Step 6: Final answer
   x = 1,269.54