Finding the Fourth Proportional to 10,899.36, 16,344.18 and 3,969

Step by Step Solution

1. Step 1: Write the proportion equation
   10,899.36 : 16,344.18 = 3,969 : x
2. Step 2: Convert to fraction form
   10,899.36/16,344.18 = 3,969/x
3. Step 3: Cross multiply
   10,899.36x = 16,344.18 × 3,969
4. Step 4: Simplify right side
   10,899.36x = 64,870,050.42
5. Step 5: Solve for x
   x = 64,870,050.42/10,899.36
6. Step 6: Final answer
   x = 5,951.73