Finding the Third Proportional to 621,868 and 1,318,468

Step by Step Solution

1. Step 1: Write the proportion equation
   621,868 : 1,318,468 = 1,318,468 : x
2. Step 2: Convert to fraction form
   621,868/1,318,468 = 1,318,468/x
3. Step 3: Cross multiply
   621,868x = 1,318,468 × 1,318,468
4. Step 4: Simplify right side
   621,868x = 1,738,357,867,024
5. Step 5: Solve for x
   x = 1,738,357,867,024/621,868
6. Step 6: Final answer
   x = 2,795,380.80