Finding the Fourth Proportional to 22,957.34, 31,678.69 and 12,886.88

Step by Step Solution

1. Step 1: Write the proportion equation
   22,957.34 : 31,678.69 = 12,886.88 : x
2. Step 2: Convert to fraction form
   22,957.34/31,678.69 = 12,886.88/x
3. Step 3: Cross multiply
   22,957.34x = 31,678.69 × 12,886.88
4. Step 4: Simplify right side
   22,957.34x = 408,239,491.35
5. Step 5: Solve for x
   x = 408,239,491.35/22,957.34
6. Step 6: Final answer
   x = 17,782.53