Finding the Fourth Proportional to 21,726.72, 32,578.56 and 9,408

Step by Step Solution

1. Step 1: Write the proportion equation
   21,726.72 : 32,578.56 = 9,408 : x
2. Step 2: Convert to fraction form
   21,726.72/32,578.56 = 9,408/x
3. Step 3: Cross multiply
   21,726.72x = 32,578.56 × 9,408
4. Step 4: Simplify right side
   21,726.72x = 306,499,092.48
5. Step 5: Solve for x
   x = 306,499,092.48/21,726.72
6. Step 6: Final answer
   x = 14,107.01