Finding the Third Proportional to 8,128.13 and 16,900.31

Step by Step Solution

1. Step 1: Write the proportion equation
   8,128.13 : 16,900.31 = 16,900.31 : x
2. Step 2: Convert to fraction form
   8,128.13/16,900.31 = 16,900.31/x
3. Step 3: Cross multiply
   8,128.13x = 16,900.31 × 16,900.31
4. Step 4: Simplify right side
   8,128.13x = 285,620,562.60
5. Step 5: Solve for x
   x = 285,620,562.60/8,128.13
6. Step 6: Final answer
   x = 35,139.78