Finding the Fourth Proportional to 2,581.56, 3,872.32 and 1,120.37

Step by Step Solution

1. Step 1: Write the proportion equation
   2,581.56 : 3,872.32 = 1,120.37 : x
2. Step 2: Convert to fraction form
   2,581.56/3,872.32 = 1,120.37/x
3. Step 3: Cross multiply
   2,581.56x = 3,872.32 × 1,120.37
4. Step 4: Simplify right side
   2,581.56x = 4,338,409.00
5. Step 5: Solve for x
   x = 4,338,409.00/2,581.56
6. Step 6: Final answer
   x = 1,680.54