Finding the Fourth Proportional to 22,680.72, 31,300.54 and 12,609.36

Step by Step Solution

1. Step 1: Write the proportion equation
   22,680.72 : 31,300.54 = 12,609.36 : x
2. Step 2: Convert to fraction form
   22,680.72/31,300.54 = 12,609.36/x
3. Step 3: Cross multiply
   22,680.72x = 31,300.54 × 12,609.36
4. Step 4: Simplify right side
   22,680.72x = 394,679,745.53
5. Step 5: Solve for x
   x = 394,679,745.53/22,680.72
6. Step 6: Final answer
   x = 17,401.55