Finding the Fourth Proportional to 3,997.97, 5,511.27 and 2,581.55

Step by Step Solution

1. Step 1: Write the proportion equation
   3,997.97 : 5,511.27 = 2,581.55 : x
2. Step 2: Convert to fraction form
   3,997.97/5,511.27 = 2,581.55/x
3. Step 3: Cross multiply
   3,997.97x = 5,511.27 × 2,581.55
4. Step 4: Simplify right side
   3,997.97x = 14,227,619.07
5. Step 5: Solve for x
   x = 14,227,619.07/3,997.97
6. Step 6: Final answer
   x = 3,558.71