Finding the Fourth Proportional to 3,408.66, 5,111.28 and 1,764.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,408.66 : 5,111.28 = 1,764.72 : x
2. Step 2: Convert to fraction form
   3,408.66/5,111.28 = 1,764.72/x
3. Step 3: Cross multiply
   3,408.66x = 5,111.28 × 1,764.72
4. Step 4: Simplify right side
   3,408.66x = 9,019,978.04
5. Step 5: Solve for x
   x = 9,019,978.04/3,408.66
6. Step 6: Final answer
   x = 2,646.19