Finding the Fourth Proportional to 2,443.20, 3,664.96 and 1,056.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,443.20 : 3,664.96 = 1,056.80 : x
2. Step 2: Convert to fraction form
   2,443.20/3,664.96 = 1,056.80/x
3. Step 3: Cross multiply
   2,443.20x = 3,664.96 × 1,056.80
4. Step 4: Simplify right side
   2,443.20x = 3,873,129.73
5. Step 5: Solve for x
   x = 3,873,129.73/2,443.20
6. Step 6: Final answer
   x = 1,585.27