Finding the Fourth Proportional to 22,520.69, 31,078.32 and 12,448.64

Step by Step Solution

1. Step 1: Write the proportion equation
   22,520.69 : 31,078.32 = 12,448.64 : x
2. Step 2: Convert to fraction form
   22,520.69/31,078.32 = 12,448.64/x
3. Step 3: Cross multiply
   22,520.69x = 31,078.32 × 12,448.64
4. Step 4: Simplify right side
   22,520.69x = 386,882,962.26
5. Step 5: Solve for x
   x = 386,882,962.26/22,520.69
6. Step 6: Final answer
   x = 17,179.00