Finding the Fourth Proportional to 3,964.21, 5,940.78 and 3,376.15

Step by Step Solution

1. Step 1: Write the proportion equation
   3,964.21 : 5,940.78 = 3,376.15 : x
2. Step 2: Convert to fraction form
   3,964.21/5,940.78 = 3,376.15/x
3. Step 3: Cross multiply
   3,964.21x = 5,940.78 × 3,376.15
4. Step 4: Simplify right side
   3,964.21x = 20,056,964.40
5. Step 5: Solve for x
   x = 20,056,964.40/3,964.21
6. Step 6: Final answer
   x = 5,059.51