Finding the Fourth Proportional to 12,838.69, 17,747.27 and 12,315.43

Step by Step Solution

1. Step 1: Write the proportion equation
   12,838.69 : 17,747.27 = 12,315.43 : x
2. Step 2: Convert to fraction form
   12,838.69/17,747.27 = 12,315.43/x
3. Step 3: Cross multiply
   12,838.69x = 17,747.27 × 12,315.43
4. Step 4: Simplify right side
   12,838.69x = 218,565,261.38
5. Step 5: Solve for x
   x = 218,565,261.38/12,838.69
6. Step 6: Final answer
   x = 17,023.95