Finding the Fourth Proportional to 2,608.27, 3,911.60 and 1,047.45

Step by Step Solution

1. Step 1: Write the proportion equation
   2,608.27 : 3,911.60 = 1,047.45 : x
2. Step 2: Convert to fraction form
   2,608.27/3,911.60 = 1,047.45/x
3. Step 3: Cross multiply
   2,608.27x = 3,911.60 × 1,047.45
4. Step 4: Simplify right side
   2,608.27x = 4,097,208.04
5. Step 5: Solve for x
   x = 4,097,208.04/2,608.27
6. Step 6: Final answer
   x = 1,570.85