Finding the Fourth Proportional to 14,016.64, 19,341.98 and 7,728.88

Step by Step Solution

1. Step 1: Write the proportion equation
   14,016.64 : 19,341.98 = 7,728.88 : x
2. Step 2: Convert to fraction form
   14,016.64/19,341.98 = 7,728.88/x
3. Step 3: Cross multiply
   14,016.64x = 19,341.98 × 7,728.88
4. Step 4: Simplify right side
   14,016.64x = 149,491,803.74
5. Step 5: Solve for x
   x = 149,491,803.74/14,016.64
6. Step 6: Final answer
   x = 10,665.31