Finding the Fourth Proportional to 22,238.83, 30,689.31 and 12,678.41

Step by Step Solution

1. Step 1: Write the proportion equation
   22,238.83 : 30,689.31 = 12,678.41 : x
2. Step 2: Convert to fraction form
   22,238.83/30,689.31 = 12,678.41/x
3. Step 3: Cross multiply
   22,238.83x = 30,689.31 × 12,678.41
4. Step 4: Simplify right side
   22,238.83x = 389,091,628.93
5. Step 5: Solve for x
   x = 389,091,628.93/22,238.83
6. Step 6: Final answer
   x = 17,496.05