Finding the Third Proportional to 813,900 and 1,245,042

Step by Step Solution

1. Step 1: Write the proportion equation
   813,900 : 1,245,042 = 1,245,042 : x
2. Step 2: Convert to fraction form
   813,900/1,245,042 = 1,245,042/x
3. Step 3: Cross multiply
   813,900x = 1,245,042 × 1,245,042
4. Step 4: Simplify right side
   813,900x = 1,550,129,581,764
5. Step 5: Solve for x
   x = 1,550,129,581,764/813,900
6. Step 6: Final answer
   x = 1,904,570.07