Finding the Fourth Proportional to 3,958.89, 5,909.10 and 3,491.96

Step by Step Solution

1. Step 1: Write the proportion equation
   3,958.89 : 5,909.10 = 3,491.96 : x
2. Step 2: Convert to fraction form
   3,958.89/5,909.10 = 3,491.96/x
3. Step 3: Cross multiply
   3,958.89x = 5,909.10 × 3,491.96
4. Step 4: Simplify right side
   3,958.89x = 20,634,323.38
5. Step 5: Solve for x
   x = 20,634,323.38/3,958.89
6. Step 6: Final answer
   x = 5,212.15