Finding the Fourth Proportional to 22,889.94, 31,584.56 and 12,818.80

Step by Step Solution

1. Step 1: Write the proportion equation
   22,889.94 : 31,584.56 = 12,818.80 : x
2. Step 2: Convert to fraction form
   22,889.94/31,584.56 = 12,818.80/x
3. Step 3: Cross multiply
   22,889.94x = 31,584.56 × 12,818.80
4. Step 4: Simplify right side
   22,889.94x = 404,876,157.73
5. Step 5: Solve for x
   x = 404,876,157.73/22,889.94
6. Step 6: Final answer
   x = 17,687.95