Finding the Third Proportional to 195,516 and 428,398

Step by Step Solution

1. Step 1: Write the proportion equation
   195,516 : 428,398 = 428,398 : x
2. Step 2: Convert to fraction form
   195,516/428,398 = 428,398/x
3. Step 3: Cross multiply
   195,516x = 428,398 × 428,398
4. Step 4: Simplify right side
   195,516x = 183,524,846,404
5. Step 5: Solve for x
   x = 183,524,846,404/195,516
6. Step 6: Final answer
   x = 938,669.20