Finding the Third Proportional to 858,202 and 1,200,389

Step by Step Solution

1. Step 1: Write the proportion equation
   858,202 : 1,200,389 = 1,200,389 : x
2. Step 2: Convert to fraction form
   858,202/1,200,389 = 1,200,389/x
3. Step 3: Cross multiply
   858,202x = 1,200,389 × 1,200,389
4. Step 4: Simplify right side
   858,202x = 1,440,933,751,321
5. Step 5: Solve for x
   x = 1,440,933,751,321/858,202
6. Step 6: Final answer
   x = 1,679,014.67