Finding the Fourth Proportional to 22,885, 31,577.12 and 12,813.60

Step by Step Solution

1. Step 1: Write the proportion equation
   22,885 : 31,577.12 = 12,813.60 : x
2. Step 2: Convert to fraction form
   22,885/31,577.12 = 12,813.60/x
3. Step 3: Cross multiply
   22,885x = 31,577.12 × 12,813.60
4. Step 4: Simplify right side
   22,885x = 404,616,584.83
5. Step 5: Solve for x
   x = 404,616,584.83/22,885
6. Step 6: Final answer
   x = 17,680.43