Finding the Fourth Proportional to 14,435.94, 19,921.60 and 8,148.72

Step by Step Solution

1. Step 1: Write the proportion equation
   14,435.94 : 19,921.60 = 8,148.72 : x
2. Step 2: Convert to fraction form
   14,435.94/19,921.60 = 8,148.72/x
3. Step 3: Cross multiply
   14,435.94x = 19,921.60 × 8,148.72
4. Step 4: Simplify right side
   14,435.94x = 162,335,449.80
5. Step 5: Solve for x
   x = 162,335,449.80/14,435.94
6. Step 6: Final answer
   x = 11,245.23