Finding the Fourth Proportional to 3,958.76, 5,456.21 and 3,426.59

Step by Step Solution

1. Step 1: Write the proportion equation
   3,958.76 : 5,456.21 = 3,426.59 : x
2. Step 2: Convert to fraction form
   3,958.76/5,456.21 = 3,426.59/x
3. Step 3: Cross multiply
   3,958.76x = 5,456.21 × 3,426.59
4. Step 4: Simplify right side
   3,958.76x = 18,696,150.21
5. Step 5: Solve for x
   x = 18,696,150.21/3,958.76
6. Step 6: Final answer
   x = 4,722.73