Finding the Fourth Proportional to 22,528.38, 31,087.91 and 12,456.22

Step by Step Solution

1. Step 1: Write the proportion equation
   22,528.38 : 31,087.91 = 12,456.22 : x
2. Step 2: Convert to fraction form
   22,528.38/31,087.91 = 12,456.22/x
3. Step 3: Cross multiply
   22,528.38x = 31,087.91 × 12,456.22
4. Step 4: Simplify right side
   22,528.38x = 387,237,799.72
5. Step 5: Solve for x
   x = 387,237,799.72/22,528.38
6. Step 6: Final answer
   x = 17,188.89