Finding the Fourth Proportional to 2,150.49, 3,222.69 and 916.65

Step by Step Solution

1. Step 1: Write the proportion equation
   2,150.49 : 3,222.69 = 916.65 : x
2. Step 2: Convert to fraction form
   2,150.49/3,222.69 = 916.65/x
3. Step 3: Cross multiply
   2,150.49x = 3,222.69 × 916.65
4. Step 4: Simplify right side
   2,150.49x = 2,954,078.79
5. Step 5: Solve for x
   x = 2,954,078.79/2,150.49
6. Step 6: Final answer
   x = 1,373.68