Finding the Fourth Proportional to 2,381.78, 3,573.27 and 920.54

Step by Step Solution

1. Step 1: Write the proportion equation
   2,381.78 : 3,573.27 = 920.54 : x
2. Step 2: Convert to fraction form
   2,381.78/3,573.27 = 920.54/x
3. Step 3: Cross multiply
   2,381.78x = 3,573.27 × 920.54
4. Step 4: Simplify right side
   2,381.78x = 3,289,320.10
5. Step 5: Solve for x
   x = 3,289,320.10/2,381.78
6. Step 6: Final answer
   x = 1,381.04