Finding the Third Proportional to 391,963 and 858,662

Step by Step Solution

1. Step 1: Write the proportion equation
   391,963 : 858,662 = 858,662 : x
2. Step 2: Convert to fraction form
   391,963/858,662 = 858,662/x
3. Step 3: Cross multiply
   391,963x = 858,662 × 858,662
4. Step 4: Simplify right side
   391,963x = 737,300,430,244
5. Step 5: Solve for x
   x = 737,300,430,244/391,963
6. Step 6: Final answer
   x = 1,881,045.99