Finding the Third Proportional to 196,778 and 426,172

Step by Step Solution

1. Step 1: Write the proportion equation
   196,778 : 426,172 = 426,172 : x
2. Step 2: Convert to fraction form
   196,778/426,172 = 426,172/x
3. Step 3: Cross multiply
   196,778x = 426,172 × 426,172
4. Step 4: Simplify right side
   196,778x = 181,622,573,584
5. Step 5: Solve for x
   x = 181,622,573,584/196,778
6. Step 6: Final answer
   x = 922,982.11