Finding the Fourth Proportional to 22,839.74, 31,518.74 and 12,768.18

Step by Step Solution

1. Step 1: Write the proportion equation
   22,839.74 : 31,518.74 = 12,768.18 : x
2. Step 2: Convert to fraction form
   22,839.74/31,518.74 = 12,768.18/x
3. Step 3: Cross multiply
   22,839.74x = 31,518.74 × 12,768.18
4. Step 4: Simplify right side
   22,839.74x = 402,436,945.69
5. Step 5: Solve for x
   x = 402,436,945.69/22,839.74
6. Step 6: Final answer
   x = 17,620.03