Finding the Fourth Proportional to 16,271.89, 24,428.79 and 13,111.27

Step by Step Solution

1. Step 1: Write the proportion equation
   16,271.89 : 24,428.79 = 13,111.27 : x
2. Step 2: Convert to fraction form
   16,271.89/24,428.79 = 13,111.27/x
3. Step 3: Cross multiply
   16,271.89x = 24,428.79 × 13,111.27
4. Step 4: Simplify right side
   16,271.89x = 320,292,400.39
5. Step 5: Solve for x
   x = 320,292,400.39/16,271.89
6. Step 6: Final answer
   x = 19,683.79