Finding the Fourth Proportional to 2,150.42, 3,227.06 and 918.11

Step by Step Solution

1. Step 1: Write the proportion equation
   2,150.42 : 3,227.06 = 918.11 : x
2. Step 2: Convert to fraction form
   2,150.42/3,227.06 = 918.11/x
3. Step 3: Cross multiply
   2,150.42x = 3,227.06 × 918.11
4. Step 4: Simplify right side
   2,150.42x = 2,962,806.42
5. Step 5: Solve for x
   x = 2,962,806.42/2,150.42
6. Step 6: Final answer
   x = 1,377.78