Finding the Fourth Proportional to 22,515.37, 31,069.59 and 12,443.68

Step by Step Solution

1. Step 1: Write the proportion equation
   22,515.37 : 31,069.59 = 12,443.68 : x
2. Step 2: Convert to fraction form
   22,515.37/31,069.59 = 12,443.68/x
3. Step 3: Cross multiply
   22,515.37x = 31,069.59 × 12,443.68
4. Step 4: Simplify right side
   22,515.37x = 386,620,035.69
5. Step 5: Solve for x
   x = 386,620,035.69/22,515.37
6. Step 6: Final answer
   x = 17,171.38