Finding the Fourth Proportional to 22,890.93, 31,590.18 and 12,819.33

Step by Step Solution

1. Step 1: Write the proportion equation
   22,890.93 : 31,590.18 = 12,819.33 : x
2. Step 2: Convert to fraction form
   22,890.93/31,590.18 = 12,819.33/x
3. Step 3: Cross multiply
   22,890.93x = 31,590.18 × 12,819.33
4. Step 4: Simplify right side
   22,890.93x = 404,964,942.18
5. Step 5: Solve for x
   x = 404,964,942.18/22,890.93
6. Step 6: Final answer
   x = 17,691.07