Finding the Fourth Proportional to 22,680.96, 31,299.72 and 12,609.12

Step by Step Solution

1. Step 1: Write the proportion equation
   22,680.96 : 31,299.72 = 12,609.12 : x
2. Step 2: Convert to fraction form
   22,680.96/31,299.72 = 12,609.12/x
3. Step 3: Cross multiply
   22,680.96x = 31,299.72 × 12,609.12
4. Step 4: Simplify right side
   22,680.96x = 394,661,925.45
5. Step 5: Solve for x
   x = 394,661,925.45/22,680.96
6. Step 6: Final answer
   x = 17,400.58