Finding the Third Proportional to 196,112 and 428,189

Step by Step Solution

1. Step 1: Write the proportion equation
   196,112 : 428,189 = 428,189 : x
2. Step 2: Convert to fraction form
   196,112/428,189 = 428,189/x
3. Step 3: Cross multiply
   196,112x = 428,189 × 428,189
4. Step 4: Simplify right side
   196,112x = 183,345,819,721
5. Step 5: Solve for x
   x = 183,345,819,721/196,112
6. Step 6: Final answer
   x = 934,903.63