Finding the Fourth Proportional to 21,849.72, 30,144.06 and 13,451.64

Step by Step Solution

1. Step 1: Write the proportion equation
   21,849.72 : 30,144.06 = 13,451.64 : x
2. Step 2: Convert to fraction form
   21,849.72/30,144.06 = 13,451.64/x
3. Step 3: Cross multiply
   21,849.72x = 30,144.06 × 13,451.64
4. Step 4: Simplify right side
   21,849.72x = 405,487,043.26
5. Step 5: Solve for x
   x = 405,487,043.26/21,849.72
6. Step 6: Final answer
   x = 18,558.00