Finding the Fourth Proportional to 22,722, 31,356.36 and 12,786

Step by Step Solution

1. Step 1: Write the proportion equation
   22,722 : 31,356.36 = 12,786 : x
2. Step 2: Convert to fraction form
   22,722/31,356.36 = 12,786/x
3. Step 3: Cross multiply
   22,722x = 31,356.36 × 12,786
4. Step 4: Simplify right side
   22,722x = 400,922,418.96
5. Step 5: Solve for x
   x = 400,922,418.96/22,722
6. Step 6: Final answer
   x = 17,644.68