Finding the Fourth Proportional to 22,959.81, 31,684.52 and 12,888.27

Step by Step Solution

1. Step 1: Write the proportion equation
   22,959.81 : 31,684.52 = 12,888.27 : x
2. Step 2: Convert to fraction form
   22,959.81/31,684.52 = 12,888.27/x
3. Step 3: Cross multiply
   22,959.81x = 31,684.52 × 12,888.27
4. Step 4: Simplify right side
   22,959.81x = 408,358,680.80
5. Step 5: Solve for x
   x = 408,358,680.80/22,959.81
6. Step 6: Final answer
   x = 17,785.80