Finding the Fourth Proportional to 10,649.63, 14,682.83 and 8,728.37

Step by Step Solution

1. Step 1: Write the proportion equation
   10,649.63 : 14,682.83 = 8,728.37 : x
2. Step 2: Convert to fraction form
   10,649.63/14,682.83 = 8,728.37/x
3. Step 3: Cross multiply
   10,649.63x = 14,682.83 × 8,728.37
4. Step 4: Simplify right side
   10,649.63x = 128,157,129.25
5. Step 5: Solve for x
   x = 128,157,129.25/10,649.63
6. Step 6: Final answer
   x = 12,033.96