Finding the Fourth Proportional to 2,428.62, 3,643.82 and 1,455.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,428.62 : 3,643.82 = 1,455.40 : x
2. Step 2: Convert to fraction form
   2,428.62/3,643.82 = 1,455.40/x
3. Step 3: Cross multiply
   2,428.62x = 3,643.82 × 1,455.40
4. Step 4: Simplify right side
   2,428.62x = 5,303,215.63
5. Step 5: Solve for x
   x = 5,303,215.63/2,428.62
6. Step 6: Final answer
   x = 2,183.63