Finding the Fourth Proportional to 1,443.77, 1,992.75 and 919.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,443.77 : 1,992.75 = 919.50 : x
2. Step 2: Convert to fraction form
   1,443.77/1,992.75 = 919.50/x
3. Step 3: Cross multiply
   1,443.77x = 1,992.75 × 919.50
4. Step 4: Simplify right side
   1,443.77x = 1,832,330.18
5. Step 5: Solve for x
   x = 1,832,330.18/1,443.77
6. Step 6: Final answer
   x = 1,269.13