Finding the Fourth Proportional to 2,581.18, 3,878.61 and 1,411.90

Step by Step Solution

1. Step 1: Write the proportion equation
   2,581.18 : 3,878.61 = 1,411.90 : x
2. Step 2: Convert to fraction form
   2,581.18/3,878.61 = 1,411.90/x
3. Step 3: Cross multiply
   2,581.18x = 3,878.61 × 1,411.90
4. Step 4: Simplify right side
   2,581.18x = 5,476,209.46
5. Step 5: Solve for x
   x = 5,476,209.46/2,581.18
6. Step 6: Final answer
   x = 2,121.59