Finding the Fourth Proportional to 22,644.22, 31,251 and 13,215.82

Step by Step Solution

1. Step 1: Write the proportion equation
   22,644.22 : 31,251 = 13,215.82 : x
2. Step 2: Convert to fraction form
   22,644.22/31,251 = 13,215.82/x
3. Step 3: Cross multiply
   22,644.22x = 31,251 × 13,215.82
4. Step 4: Simplify right side
   22,644.22x = 413,007,590.82
5. Step 5: Solve for x
   x = 413,007,590.82/22,644.22
6. Step 6: Final answer
   x = 18,238.99