Finding the Fourth Proportional to 2,152.15, 3,226.89 and 918.85

Step by Step Solution

1. Step 1: Write the proportion equation
   2,152.15 : 3,226.89 = 918.85 : x
2. Step 2: Convert to fraction form
   2,152.15/3,226.89 = 918.85/x
3. Step 3: Cross multiply
   2,152.15x = 3,226.89 × 918.85
4. Step 4: Simplify right side
   2,152.15x = 2,965,027.88
5. Step 5: Solve for x
   x = 2,965,027.88/2,152.15
6. Step 6: Final answer
   x = 1,377.71