Finding the Fourth Proportional to 22,801.74, 31,466.16 and 12,729.96

Step by Step Solution

1. Step 1: Write the proportion equation
   22,801.74 : 31,466.16 = 12,729.96 : x
2. Step 2: Convert to fraction form
   22,801.74/31,466.16 = 12,729.96/x
3. Step 3: Cross multiply
   22,801.74x = 31,466.16 × 12,729.96
4. Step 4: Simplify right side
   22,801.74x = 400,562,958.15
5. Step 5: Solve for x
   x = 400,562,958.15/22,801.74
6. Step 6: Final answer
   x = 17,567.21