Finding the Fourth Proportional to 22,793, 31,452.16 and 12,720.64

Step by Step Solution

1. Step 1: Write the proportion equation
   22,793 : 31,452.16 = 12,720.64 : x
2. Step 2: Convert to fraction form
   22,793/31,452.16 = 12,720.64/x
3. Step 3: Cross multiply
   22,793x = 31,452.16 × 12,720.64
4. Step 4: Simplify right side
   22,793x = 400,091,604.58
5. Step 5: Solve for x
   x = 400,091,604.58/22,793
6. Step 6: Final answer
   x = 17,553.27