Finding the Fourth Proportional to 2,648.14, 3,969.38 and 891.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,648.14 : 3,969.38 = 891.48 : x
2. Step 2: Convert to fraction form
   2,648.14/3,969.38 = 891.48/x
3. Step 3: Cross multiply
   2,648.14x = 3,969.38 × 891.48
4. Step 4: Simplify right side
   2,648.14x = 3,538,622.88
5. Step 5: Solve for x
   x = 3,538,622.88/2,648.14
6. Step 6: Final answer
   x = 1,336.27