Finding the Fourth Proportional to 22,882.77, 31,578.30 and 12,811.23

Step by Step Solution

1. Step 1: Write the proportion equation
   22,882.77 : 31,578.30 = 12,811.23 : x
2. Step 2: Convert to fraction form
   22,882.77/31,578.30 = 12,811.23/x
3. Step 3: Cross multiply
   22,882.77x = 31,578.30 × 12,811.23
4. Step 4: Simplify right side
   22,882.77x = 404,556,864.31
5. Step 5: Solve for x
   x = 404,556,864.31/22,882.77
6. Step 6: Final answer
   x = 17,679.54