Finding the Fourth Proportional to 21,100.72, 31,654.60 and 8,627.44

Step by Step Solution

1. Step 1: Write the proportion equation
   21,100.72 : 31,654.60 = 8,627.44 : x
2. Step 2: Convert to fraction form
   21,100.72/31,654.60 = 8,627.44/x
3. Step 3: Cross multiply
   21,100.72x = 31,654.60 × 8,627.44
4. Step 4: Simplify right side
   21,100.72x = 273,098,162.22
5. Step 5: Solve for x
   x = 273,098,162.22/21,100.72
6. Step 6: Final answer
   x = 12,942.60