Finding the Third Proportional to 807,684 and 1,245,219

Step by Step Solution

1. Step 1: Write the proportion equation
   807,684 : 1,245,219 = 1,245,219 : x
2. Step 2: Convert to fraction form
   807,684/1,245,219 = 1,245,219/x
3. Step 3: Cross multiply
   807,684x = 1,245,219 × 1,245,219
4. Step 4: Simplify right side
   807,684x = 1,550,570,357,961
5. Step 5: Solve for x
   x = 1,550,570,357,961/807,684
6. Step 6: Final answer
   x = 1,919,773.52