Finding the Fourth Proportional to 3,974.82, 5,952.78 and 2,121.30

Step by Step Solution

1. Step 1: Write the proportion equation
   3,974.82 : 5,952.78 = 2,121.30 : x
2. Step 2: Convert to fraction form
   3,974.82/5,952.78 = 2,121.30/x
3. Step 3: Cross multiply
   3,974.82x = 5,952.78 × 2,121.30
4. Step 4: Simplify right side
   3,974.82x = 12,627,632.21
5. Step 5: Solve for x
   x = 12,627,632.21/3,974.82
6. Step 6: Final answer
   x = 3,176.91