Finding the Fourth Proportional to 3,894.78, 5,842.23 and 1,297.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,894.78 : 5,842.23 = 1,297.72 : x
2. Step 2: Convert to fraction form
   3,894.78/5,842.23 = 1,297.72/x
3. Step 3: Cross multiply
   3,894.78x = 5,842.23 × 1,297.72
4. Step 4: Simplify right side
   3,894.78x = 7,581,578.72
5. Step 5: Solve for x
   x = 7,581,578.72/3,894.78
6. Step 6: Final answer
   x = 1,946.60