Finding the Fourth Proportional to 2,152.56, 3,228.82 and 918.92

Step by Step Solution

1. Step 1: Write the proportion equation
   2,152.56 : 3,228.82 = 918.92 : x
2. Step 2: Convert to fraction form
   2,152.56/3,228.82 = 918.92/x
3. Step 3: Cross multiply
   2,152.56x = 3,228.82 × 918.92
4. Step 4: Simplify right side
   2,152.56x = 2,967,027.27
5. Step 5: Solve for x
   x = 2,967,027.27/2,152.56
6. Step 6: Final answer
   x = 1,378.37