Finding the Fourth Proportional to 22,676.48, 31,291.18 and 12,603.30

Step by Step Solution

1. Step 1: Write the proportion equation
   22,676.48 : 31,291.18 = 12,603.30 : x
2. Step 2: Convert to fraction form
   22,676.48/31,291.18 = 12,603.30/x
3. Step 3: Cross multiply
   22,676.48x = 31,291.18 × 12,603.30
4. Step 4: Simplify right side
   22,676.48x = 394,372,128.89
5. Step 5: Solve for x
   x = 394,372,128.89/22,676.48
6. Step 6: Final answer
   x = 17,391.24