Finding the Fourth Proportional to 22,678.48, 31,293.94 and 12,605.30

Step by Step Solution

1. Step 1: Write the proportion equation
   22,678.48 : 31,293.94 = 12,605.30 : x
2. Step 2: Convert to fraction form
   22,678.48/31,293.94 = 12,605.30/x
3. Step 3: Cross multiply
   22,678.48x = 31,293.94 × 12,605.30
4. Step 4: Simplify right side
   22,678.48x = 394,469,501.88
5. Step 5: Solve for x
   x = 394,469,501.88/22,678.48
6. Step 6: Final answer
   x = 17,394.00