Finding the Fourth Proportional to 2,151.09, 3,223.80 and 918.27

Step by Step Solution

1. Step 1: Write the proportion equation
   2,151.09 : 3,223.80 = 918.27 : x
2. Step 2: Convert to fraction form
   2,151.09/3,223.80 = 918.27/x
3. Step 3: Cross multiply
   2,151.09x = 3,223.80 × 918.27
4. Step 4: Simplify right side
   2,151.09x = 2,960,318.83
5. Step 5: Solve for x
   x = 2,960,318.83/2,151.09
6. Step 6: Final answer
   x = 1,376.19