Finding the Fourth Proportional to 3,923.67, 5,423.27 and 3,447.99

Step by Step Solution

1. Step 1: Write the proportion equation
   3,923.67 : 5,423.27 = 3,447.99 : x
2. Step 2: Convert to fraction form
   3,923.67/5,423.27 = 3,447.99/x
3. Step 3: Cross multiply
   3,923.67x = 5,423.27 × 3,447.99
4. Step 4: Simplify right side
   3,923.67x = 18,699,336.37
5. Step 5: Solve for x
   x = 18,699,336.37/3,923.67
6. Step 6: Final answer
   x = 4,765.78