Finding the Fourth Proportional to 3,111.27, 4,665.34 and 919.41

Step by Step Solution

1. Step 1: Write the proportion equation
   3,111.27 : 4,665.34 = 919.41 : x
2. Step 2: Convert to fraction form
   3,111.27/4,665.34 = 919.41/x
3. Step 3: Cross multiply
   3,111.27x = 4,665.34 × 919.41
4. Step 4: Simplify right side
   3,111.27x = 4,289,360.25
5. Step 5: Solve for x
   x = 4,289,360.25/3,111.27
6. Step 6: Final answer
   x = 1,378.65