Finding the Fourth Proportional to 2,380.72, 3,571.92 and 1,081.36

Step by Step Solution

1. Step 1: Write the proportion equation
   2,380.72 : 3,571.92 = 1,081.36 : x
2. Step 2: Convert to fraction form
   2,380.72/3,571.92 = 1,081.36/x
3. Step 3: Cross multiply
   2,380.72x = 3,571.92 × 1,081.36
4. Step 4: Simplify right side
   2,380.72x = 3,862,531.41
5. Step 5: Solve for x
   x = 3,862,531.41/2,380.72
6. Step 6: Final answer
   x = 1,622.42