Finding the Fourth Proportional to 2,443.56, 3,666.18 and 800.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,443.56 : 3,666.18 = 800.40 : x
2. Step 2: Convert to fraction form
   2,443.56/3,666.18 = 800.40/x
3. Step 3: Cross multiply
   2,443.56x = 3,666.18 × 800.40
4. Step 4: Simplify right side
   2,443.56x = 2,934,410.47
5. Step 5: Solve for x
   x = 2,934,410.47/2,443.56
6. Step 6: Final answer
   x = 1,200.88