Finding the Fourth Proportional to 2,648.85, 3,672.89 and 2,561.04

Step by Step Solution

1. Step 1: Write the proportion equation
   2,648.85 : 3,672.89 = 2,561.04 : x
2. Step 2: Convert to fraction form
   2,648.85/3,672.89 = 2,561.04/x
3. Step 3: Cross multiply
   2,648.85x = 3,672.89 × 2,561.04
4. Step 4: Simplify right side
   2,648.85x = 9,406,418.21
5. Step 5: Solve for x
   x = 9,406,418.21/2,648.85
6. Step 6: Final answer
   x = 3,551.13