Finding the Fourth Proportional to 22,886.92, 31,584.72 and 12,815.78

Step by Step Solution

1. Step 1: Write the proportion equation
   22,886.92 : 31,584.72 = 12,815.78 : x
2. Step 2: Convert to fraction form
   22,886.92/31,584.72 = 12,815.78/x
3. Step 3: Cross multiply
   22,886.92x = 31,584.72 × 12,815.78
4. Step 4: Simplify right side
   22,886.92x = 404,782,822.88
5. Step 5: Solve for x
   x = 404,782,822.88/22,886.92
6. Step 6: Final answer
   x = 17,686.21