Finding the Fourth Proportional to 22,708.69, 31,338.47 and 12,638.93

Step by Step Solution

1. Step 1: Write the proportion equation
   22,708.69 : 31,338.47 = 12,638.93 : x
2. Step 2: Convert to fraction form
   22,708.69/31,338.47 = 12,638.93/x
3. Step 3: Cross multiply
   22,708.69x = 31,338.47 × 12,638.93
4. Step 4: Simplify right side
   22,708.69x = 396,084,603.54
5. Step 5: Solve for x
   x = 396,084,603.54/22,708.69
6. Step 6: Final answer
   x = 17,441.99