Finding the Fourth Proportional to 10,839.72, 16,259.64 and 3,914.24

Step by Step Solution

1. Step 1: Write the proportion equation
   10,839.72 : 16,259.64 = 3,914.24 : x
2. Step 2: Convert to fraction form
   10,839.72/16,259.64 = 3,914.24/x
3. Step 3: Cross multiply
   10,839.72x = 16,259.64 × 3,914.24
4. Step 4: Simplify right side
   10,839.72x = 63,644,133.27
5. Step 5: Solve for x
   x = 63,644,133.27/10,839.72
6. Step 6: Final answer
   x = 5,871.38