Finding the Fourth Proportional to 3,923.35, 5,906.40 and 3,387.67

Step by Step Solution

1. Step 1: Write the proportion equation
   3,923.35 : 5,906.40 = 3,387.67 : x
2. Step 2: Convert to fraction form
   3,923.35/5,906.40 = 3,387.67/x
3. Step 3: Cross multiply
   3,923.35x = 5,906.40 × 3,387.67
4. Step 4: Simplify right side
   3,923.35x = 20,008,934.09
5. Step 5: Solve for x
   x = 20,008,934.09/3,923.35
6. Step 6: Final answer
   x = 5,099.96