Finding the Fourth Proportional to 22,243.29, 30,698.57 and 12,686.55

Step by Step Solution

1. Step 1: Write the proportion equation
   22,243.29 : 30,698.57 = 12,686.55 : x
2. Step 2: Convert to fraction form
   22,243.29/30,698.57 = 12,686.55/x
3. Step 3: Cross multiply
   22,243.29x = 30,698.57 × 12,686.55
4. Step 4: Simplify right side
   22,243.29x = 389,458,943.23
5. Step 5: Solve for x
   x = 389,458,943.23/22,243.29
6. Step 6: Final answer
   x = 17,509.05