Finding the Fourth Proportional to 1,483.86, 2,225.81 and 443.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,483.86 : 2,225.81 = 443.61 : x
2. Step 2: Convert to fraction form
   1,483.86/2,225.81 = 443.61/x
3. Step 3: Cross multiply
   1,483.86x = 2,225.81 × 443.61
4. Step 4: Simplify right side
   1,483.86x = 987,399.37
5. Step 5: Solve for x
   x = 987,399.37/1,483.86
6. Step 6: Final answer
   x = 665.43