Finding the Fourth Proportional to 3,408.69, 5,105.54 and 2,816.98

Step by Step Solution

1. Step 1: Write the proportion equation
   3,408.69 : 5,105.54 = 2,816.98 : x
2. Step 2: Convert to fraction form
   3,408.69/5,105.54 = 2,816.98/x
3. Step 3: Cross multiply
   3,408.69x = 5,105.54 × 2,816.98
4. Step 4: Simplify right side
   3,408.69x = 14,382,196.37
5. Step 5: Solve for x
   x = 14,382,196.37/3,408.69
6. Step 6: Final answer
   x = 4,219.28