Finding the Fourth Proportional to 2,150.89, 3,226.79 and 918.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,150.89 : 3,226.79 = 918.34 : x
2. Step 2: Convert to fraction form
   2,150.89/3,226.79 = 918.34/x
3. Step 3: Cross multiply
   2,150.89x = 3,226.79 × 918.34
4. Step 4: Simplify right side
   2,150.89x = 2,963,290.33
5. Step 5: Solve for x
   x = 2,963,290.33/2,150.89
6. Step 6: Final answer
   x = 1,377.70