Finding the Fourth Proportional to 22,672, 31,287.36 and 12,736

Step by Step Solution

1. Step 1: Write the proportion equation
   22,672 : 31,287.36 = 12,736 : x
2. Step 2: Convert to fraction form
   22,672/31,287.36 = 12,736/x
3. Step 3: Cross multiply
   22,672x = 31,287.36 × 12,736
4. Step 4: Simplify right side
   22,672x = 398,475,816.96
5. Step 5: Solve for x
   x = 398,475,816.96/22,672
6. Step 6: Final answer
   x = 17,575.68