Finding the Third Proportional to 621,842 and 1,318,414

Step by Step Solution

1. Step 1: Write the proportion equation
   621,842 : 1,318,414 = 1,318,414 : x
2. Step 2: Convert to fraction form
   621,842/1,318,414 = 1,318,414/x
3. Step 3: Cross multiply
   621,842x = 1,318,414 × 1,318,414
4. Step 4: Simplify right side
   621,842x = 1,738,215,475,396
5. Step 5: Solve for x
   x = 1,738,215,475,396/621,842
6. Step 6: Final answer
   x = 2,795,268.69