Finding the Third Proportional to 85,870 and 128,967

Step by Step Solution

1. Step 1: Write the proportion equation
   85,870 : 128,967 = 128,967 : x
2. Step 2: Convert to fraction form
   85,870/128,967 = 128,967/x
3. Step 3: Cross multiply
   85,870x = 128,967 × 128,967
4. Step 4: Simplify right side
   85,870x = 16,632,487,089
5. Step 5: Solve for x
   x = 16,632,487,089/85,870
6. Step 6: Final answer
   x = 193,693.81