Finding the Third Proportional to 858,200 and 1,200,386

Step by Step Solution

1. Step 1: Write the proportion equation
   858,200 : 1,200,386 = 1,200,386 : x
2. Step 2: Convert to fraction form
   858,200/1,200,386 = 1,200,386/x
3. Step 3: Cross multiply
   858,200x = 1,200,386 × 1,200,386
4. Step 4: Simplify right side
   858,200x = 1,440,926,548,996
5. Step 5: Solve for x
   x = 1,440,926,548,996/858,200
6. Step 6: Final answer
   x = 1,679,010.19