Finding the Fourth Proportional to 22,959, 31,682.06 and 12,885.32

Step by Step Solution

1. Step 1: Write the proportion equation
   22,959 : 31,682.06 = 12,885.32 : x
2. Step 2: Convert to fraction form
   22,959/31,682.06 = 12,885.32/x
3. Step 3: Cross multiply
   22,959x = 31,682.06 × 12,885.32
4. Step 4: Simplify right side
   22,959x = 408,233,481.36
5. Step 5: Solve for x
   x = 408,233,481.36/22,959
6. Step 6: Final answer
   x = 17,780.98