Finding the Fourth Proportional to 14,309.52, 21,447.69 and 5,419.20

Step by Step Solution

1. Step 1: Write the proportion equation
   14,309.52 : 21,447.69 = 5,419.20 : x
2. Step 2: Convert to fraction form
   14,309.52/21,447.69 = 5,419.20/x
3. Step 3: Cross multiply
   14,309.52x = 21,447.69 × 5,419.20
4. Step 4: Simplify right side
   14,309.52x = 116,229,321.65
5. Step 5: Solve for x
   x = 116,229,321.65/14,309.52
6. Step 6: Final answer
   x = 8,122.52