Finding the Fourth Proportional to 22,886.86, 31,584.39 and 12,815.02

Step by Step Solution

1. Step 1: Write the proportion equation
   22,886.86 : 31,584.39 = 12,815.02 : x
2. Step 2: Convert to fraction form
   22,886.86/31,584.39 = 12,815.02/x
3. Step 3: Cross multiply
   22,886.86x = 31,584.39 × 12,815.02
4. Step 4: Simplify right side
   22,886.86x = 404,754,589.54
5. Step 5: Solve for x
   x = 404,754,589.54/22,886.86
6. Step 6: Final answer
   x = 17,685.02