Finding the Fourth Proportional to 1,443.92, 1,991.76 and 919.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,443.92 : 1,991.76 = 919.52 : x
2. Step 2: Convert to fraction form
   1,443.92/1,991.76 = 919.52/x
3. Step 3: Cross multiply
   1,443.92x = 1,991.76 × 919.52
4. Step 4: Simplify right side
   1,443.92x = 1,831,463.16
5. Step 5: Solve for x
   x = 1,831,463.16/1,443.92
6. Step 6: Final answer
   x = 1,268.40