Finding the Fourth Proportional to 14,449.78, 21,679.89 and 5,679.82

Step by Step Solution

1. Step 1: Write the proportion equation
   14,449.78 : 21,679.89 = 5,679.82 : x
2. Step 2: Convert to fraction form
   14,449.78/21,679.89 = 5,679.82/x
3. Step 3: Cross multiply
   14,449.78x = 21,679.89 × 5,679.82
4. Step 4: Simplify right side
   14,449.78x = 123,137,872.82
5. Step 5: Solve for x
   x = 123,137,872.82/14,449.78
6. Step 6: Final answer
   x = 8,521.78