Finding the Fourth Proportional to 2,465.40, 3,401.28 and 1,581.06

Step by Step Solution

1. Step 1: Write the proportion equation
   2,465.40 : 3,401.28 = 1,581.06 : x
2. Step 2: Convert to fraction form
   2,465.40/3,401.28 = 1,581.06/x
3. Step 3: Cross multiply
   2,465.40x = 3,401.28 × 1,581.06
4. Step 4: Simplify right side
   2,465.40x = 5,377,627.76
5. Step 5: Solve for x
   x = 5,377,627.76/2,465.40
6. Step 6: Final answer
   x = 2,181.24