Finding the Fourth Proportional to 3,676.80, 5,517.72 and 1,729.20

Step by Step Solution

1. Step 1: Write the proportion equation
   3,676.80 : 5,517.72 = 1,729.20 : x
2. Step 2: Convert to fraction form
   3,676.80/5,517.72 = 1,729.20/x
3. Step 3: Cross multiply
   3,676.80x = 5,517.72 × 1,729.20
4. Step 4: Simplify right side
   3,676.80x = 9,541,241.42
5. Step 5: Solve for x
   x = 9,541,241.42/3,676.80
6. Step 6: Final answer
   x = 2,594.99