Finding the Fourth Proportional to 9,979.67, 14,965.39 and 3,406.39

Step by Step Solution

1. Step 1: Write the proportion equation
   9,979.67 : 14,965.39 = 3,406.39 : x
2. Step 2: Convert to fraction form
   9,979.67/14,965.39 = 3,406.39/x
3. Step 3: Cross multiply
   9,979.67x = 14,965.39 × 3,406.39
4. Step 4: Simplify right side
   9,979.67x = 50,977,921.69
5. Step 5: Solve for x
   x = 50,977,921.69/9,979.67
6. Step 6: Final answer
   x = 5,108.18