Finding the Third Proportional to 85,436 and 128,112

Step by Step Solution

1. Step 1: Write the proportion equation
   85,436 : 128,112 = 128,112 : x
2. Step 2: Convert to fraction form
   85,436/128,112 = 128,112/x
3. Step 3: Cross multiply
   85,436x = 128,112 × 128,112
4. Step 4: Simplify right side
   85,436x = 16,412,684,544
5. Step 5: Solve for x
   x = 16,412,684,544/85,436
6. Step 6: Final answer
   x = 192,105.02