Finding the Fourth Proportional to 16,039.76, 24,148.78 and 13,896.50

Step by Step Solution

1. Step 1: Write the proportion equation
   16,039.76 : 24,148.78 = 13,896.50 : x
2. Step 2: Convert to fraction form
   16,039.76/24,148.78 = 13,896.50/x
3. Step 3: Cross multiply
   16,039.76x = 24,148.78 × 13,896.50
4. Step 4: Simplify right side
   16,039.76x = 335,583,521.27
5. Step 5: Solve for x
   x = 335,583,521.27/16,039.76
6. Step 6: Final answer
   x = 20,921.98