Finding the Fourth Proportional to 14,843.53, 20,483.61 and 8,128.98

Step by Step Solution

1. Step 1: Write the proportion equation
   14,843.53 : 20,483.61 = 8,128.98 : x
2. Step 2: Convert to fraction form
   14,843.53/20,483.61 = 8,128.98/x
3. Step 3: Cross multiply
   14,843.53x = 20,483.61 × 8,128.98
4. Step 4: Simplify right side
   14,843.53x = 166,510,932.83
5. Step 5: Solve for x
   x = 166,510,932.83/14,843.53
6. Step 6: Final answer
   x = 11,217.74