Finding the Fourth Proportional to 2,481.37, 3,722.15 and 921.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,481.37 : 3,722.15 = 921.78 : x
2. Step 2: Convert to fraction form
   2,481.37/3,722.15 = 921.78/x
3. Step 3: Cross multiply
   2,481.37x = 3,722.15 × 921.78
4. Step 4: Simplify right side
   2,481.37x = 3,431,005.73
5. Step 5: Solve for x
   x = 3,431,005.73/2,481.37
6. Step 6: Final answer
   x = 1,382.71