Finding the Third Proportional to 621,854 and 1,318,440

Step by Step Solution

1. Step 1: Write the proportion equation
   621,854 : 1,318,440 = 1,318,440 : x
2. Step 2: Convert to fraction form
   621,854/1,318,440 = 1,318,440/x
3. Step 3: Cross multiply
   621,854x = 1,318,440 × 1,318,440
4. Step 4: Simplify right side
   621,854x = 1,738,284,033,600
5. Step 5: Solve for x
   x = 1,738,284,033,600/621,854
6. Step 6: Final answer
   x = 2,795,325.00