Finding the Fourth Proportional to 21,945.72, 30,272.76 and 13,451.96

Step by Step Solution

1. Step 1: Write the proportion equation
   21,945.72 : 30,272.76 = 13,451.96 : x
2. Step 2: Convert to fraction form
   21,945.72/30,272.76 = 13,451.96/x
3. Step 3: Cross multiply
   21,945.72x = 30,272.76 × 13,451.96
4. Step 4: Simplify right side
   21,945.72x = 407,227,956.61
5. Step 5: Solve for x
   x = 407,227,956.61/21,945.72
6. Step 6: Final answer
   x = 18,556.14