Finding the Fourth Proportional to 21,270.72, 29,327.04 and 13,704

Step by Step Solution

1. Step 1: Write the proportion equation
   21,270.72 : 29,327.04 = 13,704 : x
2. Step 2: Convert to fraction form
   21,270.72/29,327.04 = 13,704/x
3. Step 3: Cross multiply
   21,270.72x = 29,327.04 × 13,704
4. Step 4: Simplify right side
   21,270.72x = 401,897,756.16
5. Step 5: Solve for x
   x = 401,897,756.16/21,270.72
6. Step 6: Final answer
   x = 18,894.41