Finding the Fourth Proportional to 1,265.23, 1,898.69 and 443.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,265.23 : 1,898.69 = 443.50 : x
2. Step 2: Convert to fraction form
   1,265.23/1,898.69 = 443.50/x
3. Step 3: Cross multiply
   1,265.23x = 1,898.69 × 443.50
4. Step 4: Simplify right side
   1,265.23x = 842,069.02
5. Step 5: Solve for x
   x = 842,069.02/1,265.23
6. Step 6: Final answer
   x = 665.55