Finding the Fourth Proportional to 21,662.31, 32,488.80 and 12,650.41

Step by Step Solution

1. Step 1: Write the proportion equation
   21,662.31 : 32,488.80 = 12,650.41 : x
2. Step 2: Convert to fraction form
   21,662.31/32,488.80 = 12,650.41/x
3. Step 3: Cross multiply
   21,662.31x = 32,488.80 × 12,650.41
4. Step 4: Simplify right side
   21,662.31x = 410,996,640.41
5. Step 5: Solve for x
   x = 410,996,640.41/21,662.31
6. Step 6: Final answer
   x = 18,972.89