Finding the Fourth Proportional to 13,969.68, 20,953.89 and 4,109.28

Step by Step Solution

1. Step 1: Write the proportion equation
   13,969.68 : 20,953.89 = 4,109.28 : x
2. Step 2: Convert to fraction form
   13,969.68/20,953.89 = 4,109.28/x
3. Step 3: Cross multiply
   13,969.68x = 20,953.89 × 4,109.28
4. Step 4: Simplify right side
   13,969.68x = 86,105,401.10
5. Step 5: Solve for x
   x = 86,105,401.10/13,969.68
6. Step 6: Final answer
   x = 6,163.73