Finding the Fourth Proportional to 22,959.06, 31,685.06 and 12,888.24

Step by Step Solution

1. Step 1: Write the proportion equation
   22,959.06 : 31,685.06 = 12,888.24 : x
2. Step 2: Convert to fraction form
   22,959.06/31,685.06 = 12,888.24/x
3. Step 3: Cross multiply
   22,959.06x = 31,685.06 × 12,888.24
4. Step 4: Simplify right side
   22,959.06x = 408,364,657.69
5. Step 5: Solve for x
   x = 408,364,657.69/22,959.06
6. Step 6: Final answer
   x = 17,786.65