Finding the Third Proportional to 639,360 and 954,662

Step by Step Solution

1. Step 1: Write the proportion equation
   639,360 : 954,662 = 954,662 : x
2. Step 2: Convert to fraction form
   639,360/954,662 = 954,662/x
3. Step 3: Cross multiply
   639,360x = 954,662 × 954,662
4. Step 4: Simplify right side
   639,360x = 911,379,534,244
5. Step 5: Solve for x
   x = 911,379,534,244/639,360
6. Step 6: Final answer
   x = 1,425,455.98