Finding the Third Proportional to 128,112 and 188,856

Step by Step Solution

1. Step 1: Write the proportion equation
   128,112 : 188,856 = 188,856 : x
2. Step 2: Convert to fraction form
   128,112/188,856 = 188,856/x
3. Step 3: Cross multiply
   128,112x = 188,856 × 188,856
4. Step 4: Simplify right side
   128,112x = 35,666,588,736
5. Step 5: Solve for x
   x = 35,666,588,736/128,112
6. Step 6: Final answer
   x = 278,401.62