Finding the Fourth Proportional to 12,128.06, 16,727.31 and 7,650.18

Step by Step Solution

1. Step 1: Write the proportion equation
   12,128.06 : 16,727.31 = 7,650.18 : x
2. Step 2: Convert to fraction form
   12,128.06/16,727.31 = 7,650.18/x
3. Step 3: Cross multiply
   12,128.06x = 16,727.31 × 7,650.18
4. Step 4: Simplify right side
   12,128.06x = 127,966,932.42
5. Step 5: Solve for x
   x = 127,966,932.42/12,128.06
6. Step 6: Final answer
   x = 10,551.31