Finding the Fourth Proportional to 22,698.78, 31,321.32 and 12,625.22

Step by Step Solution

1. Step 1: Write the proportion equation
   22,698.78 : 31,321.32 = 12,625.22 : x
2. Step 2: Convert to fraction form
   22,698.78/31,321.32 = 12,625.22/x
3. Step 3: Cross multiply
   22,698.78x = 31,321.32 × 12,625.22
4. Step 4: Simplify right side
   22,698.78x = 395,438,555.69
5. Step 5: Solve for x
   x = 395,438,555.69/22,698.78
6. Step 6: Final answer
   x = 17,421.14