Finding the Fourth Proportional to 14,843.25, 20,483.69 and 8,129.31

Step by Step Solution

1. Step 1: Write the proportion equation
   14,843.25 : 20,483.69 = 8,129.31 : x
2. Step 2: Convert to fraction form
   14,843.25/20,483.69 = 8,129.31/x
3. Step 3: Cross multiply
   14,843.25x = 20,483.69 × 8,129.31
4. Step 4: Simplify right side
   14,843.25x = 166,518,225.31
5. Step 5: Solve for x
   x = 166,518,225.31/14,843.25
6. Step 6: Final answer
   x = 11,218.45