Finding the Fourth Proportional to 21,644.33, 32,467.42 and 8,499.55

Step by Step Solution

1. Step 1: Write the proportion equation
   21,644.33 : 32,467.42 = 8,499.55 : x
2. Step 2: Convert to fraction form
   21,644.33/32,467.42 = 8,499.55/x
3. Step 3: Cross multiply
   21,644.33x = 32,467.42 × 8,499.55
4. Step 4: Simplify right side
   21,644.33x = 275,958,459.66
5. Step 5: Solve for x
   x = 275,958,459.66/21,644.33
6. Step 6: Final answer
   x = 12,749.69