Finding the Fourth Proportional to 22,821, 31,493.68 and 12,749.88

Step by Step Solution

1. Step 1: Write the proportion equation
   22,821 : 31,493.68 = 12,749.88 : x
2. Step 2: Convert to fraction form
   22,821/31,493.68 = 12,749.88/x
3. Step 3: Cross multiply
   22,821x = 31,493.68 × 12,749.88
4. Step 4: Simplify right side
   22,821x = 401,540,640.76
5. Step 5: Solve for x
   x = 401,540,640.76/22,821
6. Step 6: Final answer
   x = 17,595.23