Finding the Fourth Proportional to 22,815.51, 31,481.79 and 12,743.46

Step by Step Solution

1. Step 1: Write the proportion equation
   22,815.51 : 31,481.79 = 12,743.46 : x
2. Step 2: Convert to fraction form
   22,815.51/31,481.79 = 12,743.46/x
3. Step 3: Cross multiply
   22,815.51x = 31,481.79 × 12,743.46
4. Step 4: Simplify right side
   22,815.51x = 401,186,931.59
5. Step 5: Solve for x
   x = 401,186,931.59/22,815.51
6. Step 6: Final answer
   x = 17,583.96