Finding the Fourth Proportional to 16,222.48, 22,376.88 and 12,439.48

Step by Step Solution

1. Step 1: Write the proportion equation
   16,222.48 : 22,376.88 = 12,439.48 : x
2. Step 2: Convert to fraction form
   16,222.48/22,376.88 = 12,439.48/x
3. Step 3: Cross multiply
   16,222.48x = 22,376.88 × 12,439.48
4. Step 4: Simplify right side
   16,222.48x = 278,356,751.22
5. Step 5: Solve for x
   x = 278,356,751.22/16,222.48
6. Step 6: Final answer
   x = 17,158.71