Finding the Fourth Proportional to 3,961.59, 5,947.25 and 3,631.11

Step by Step Solution

1. Step 1: Write the proportion equation
   3,961.59 : 5,947.25 = 3,631.11 : x
2. Step 2: Convert to fraction form
   3,961.59/5,947.25 = 3,631.11/x
3. Step 3: Cross multiply
   3,961.59x = 5,947.25 × 3,631.11
4. Step 4: Simplify right side
   3,961.59x = 21,595,100.79
5. Step 5: Solve for x
   x = 21,595,100.79/3,961.59
6. Step 6: Final answer
   x = 5,451.12