Finding the Fourth Proportional to 10,986.39, 16,476.21 and 3,965.54

Step by Step Solution

1. Step 1: Write the proportion equation
   10,986.39 : 16,476.21 = 3,965.54 : x
2. Step 2: Convert to fraction form
   10,986.39/16,476.21 = 3,965.54/x
3. Step 3: Cross multiply
   10,986.39x = 16,476.21 × 3,965.54
4. Step 4: Simplify right side
   10,986.39x = 65,337,059.89
5. Step 5: Solve for x
   x = 65,337,059.89/10,986.39
6. Step 6: Final answer
   x = 5,947.09