Finding the Fourth Proportional to 1,265.22, 1,896.89 and 443.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,265.22 : 1,896.89 = 443.61 : x
2. Step 2: Convert to fraction form
   1,265.22/1,896.89 = 443.61/x
3. Step 3: Cross multiply
   1,265.22x = 1,896.89 × 443.61
4. Step 4: Simplify right side
   1,265.22x = 841,477.15
5. Step 5: Solve for x
   x = 841,477.15/1,265.22
6. Step 6: Final answer
   x = 665.08