Finding the Third Proportional to 196,436 and 428,856

Step by Step Solution

1. Step 1: Write the proportion equation
   196,436 : 428,856 = 428,856 : x
2. Step 2: Convert to fraction form
   196,436/428,856 = 428,856/x
3. Step 3: Cross multiply
   196,436x = 428,856 × 428,856
4. Step 4: Simplify right side
   196,436x = 183,917,468,736
5. Step 5: Solve for x
   x = 183,917,468,736/196,436
6. Step 6: Final answer
   x = 936,271.71