Finding the Fourth Proportional to 14,843.75, 20,483.57 and 8,128.10

Step by Step Solution

1. Step 1: Write the proportion equation
   14,843.75 : 20,483.57 = 8,128.10 : x
2. Step 2: Convert to fraction form
   14,843.75/20,483.57 = 8,128.10/x
3. Step 3: Cross multiply
   14,843.75x = 20,483.57 × 8,128.10
4. Step 4: Simplify right side
   14,843.75x = 166,492,576.85
5. Step 5: Solve for x
   x = 166,492,576.85/14,843.75
6. Step 6: Final answer
   x = 11,216.35