Finding the Third Proportional to 858,300 and 1,298,494

Step by Step Solution

1. Step 1: Write the proportion equation
   858,300 : 1,298,494 = 1,298,494 : x
2. Step 2: Convert to fraction form
   858,300/1,298,494 = 1,298,494/x
3. Step 3: Cross multiply
   858,300x = 1,298,494 × 1,298,494
4. Step 4: Simplify right side
   858,300x = 1,686,086,668,036
5. Step 5: Solve for x
   x = 1,686,086,668,036/858,300
6. Step 6: Final answer
   x = 1,964,449.11