Finding the Fourth Proportional to 12,105.33, 16,710.07 and 7,628.21

Step by Step Solution

1. Step 1: Write the proportion equation
   12,105.33 : 16,710.07 = 7,628.21 : x
2. Step 2: Convert to fraction form
   12,105.33/16,710.07 = 7,628.21/x
3. Step 3: Cross multiply
   12,105.33x = 16,710.07 × 7,628.21
4. Step 4: Simplify right side
   12,105.33x = 127,467,820.45
5. Step 5: Solve for x
   x = 127,467,820.45/12,105.33
6. Step 6: Final answer
   x = 10,529.89