Finding the Fourth Proportional to 14,796.56, 20,418.41 and 8,424.70

Step by Step Solution

1. Step 1: Write the proportion equation
   14,796.56 : 20,418.41 = 8,424.70 : x
2. Step 2: Convert to fraction form
   14,796.56/20,418.41 = 8,424.70/x
3. Step 3: Cross multiply
   14,796.56x = 20,418.41 × 8,424.70
4. Step 4: Simplify right side
   14,796.56x = 172,018,978.73
5. Step 5: Solve for x
   x = 172,018,978.73/14,796.56
6. Step 6: Final answer
   x = 11,625.61