Finding the Fourth Proportional to 2,938.69, 4,401.55 and 1,960.21

Step by Step Solution

1. Step 1: Write the proportion equation
   2,938.69 : 4,401.55 = 1,960.21 : x
2. Step 2: Convert to fraction form
   2,938.69/4,401.55 = 1,960.21/x
3. Step 3: Cross multiply
   2,938.69x = 4,401.55 × 1,960.21
4. Step 4: Simplify right side
   2,938.69x = 8,627,962.33
5. Step 5: Solve for x
   x = 8,627,962.33/2,938.69
6. Step 6: Final answer
   x = 2,935.99