Finding the Fourth Proportional to 22,815.88, 31,485.56 and 12,744.47

Step by Step Solution

1. Step 1: Write the proportion equation
   22,815.88 : 31,485.56 = 12,744.47 : x
2. Step 2: Convert to fraction form
   22,815.88/31,485.56 = 12,744.47/x
3. Step 3: Cross multiply
   22,815.88x = 31,485.56 × 12,744.47
4. Step 4: Simplify right side
   22,815.88x = 401,266,649.29
5. Step 5: Solve for x
   x = 401,266,649.29/22,815.88
6. Step 6: Final answer
   x = 17,587.17