Finding the Fourth Proportional to 22,338.82, 30,828.29 and 12,907.38

Step by Step Solution

1. Step 1: Write the proportion equation
   22,338.82 : 30,828.29 = 12,907.38 : x
2. Step 2: Convert to fraction form
   22,338.82/30,828.29 = 12,907.38/x
3. Step 3: Cross multiply
   22,338.82x = 30,828.29 × 12,907.38
4. Step 4: Simplify right side
   22,338.82x = 397,912,453.78
5. Step 5: Solve for x
   x = 397,912,453.78/22,338.82
6. Step 6: Final answer
   x = 17,812.60