Finding the Fourth Proportional to 22,826.48, 31,500.56 and 12,890.48

Step by Step Solution

1. Step 1: Write the proportion equation
   22,826.48 : 31,500.56 = 12,890.48 : x
2. Step 2: Convert to fraction form
   22,826.48/31,500.56 = 12,890.48/x
3. Step 3: Cross multiply
   22,826.48x = 31,500.56 × 12,890.48
4. Step 4: Simplify right side
   22,826.48x = 406,057,338.67
5. Step 5: Solve for x
   x = 406,057,338.67/22,826.48
6. Step 6: Final answer
   x = 17,788.87