Finding the Fourth Proportional to 1,264.78, 1,897.94 and 443.67

Step by Step Solution

1. Step 1: Write the proportion equation
   1,264.78 : 1,897.94 = 443.67 : x
2. Step 2: Convert to fraction form
   1,264.78/1,897.94 = 443.67/x
3. Step 3: Cross multiply
   1,264.78x = 1,897.94 × 443.67
4. Step 4: Simplify right side
   1,264.78x = 842,059.04
5. Step 5: Solve for x
   x = 842,059.04/1,264.78
6. Step 6: Final answer
   x = 665.78