Finding the Fourth Proportional to 3,961.82, 5,940.71 and 1,328.38

Step by Step Solution

1. Step 1: Write the proportion equation
   3,961.82 : 5,940.71 = 1,328.38 : x
2. Step 2: Convert to fraction form
   3,961.82/5,940.71 = 1,328.38/x
3. Step 3: Cross multiply
   3,961.82x = 5,940.71 × 1,328.38
4. Step 4: Simplify right side
   3,961.82x = 7,891,484.00
5. Step 5: Solve for x
   x = 7,891,484.00/3,961.82
6. Step 6: Final answer
   x = 1,991.88