Finding the Third Proportional to 643,318 and 1,374,984

Step by Step Solution

1. Step 1: Write the proportion equation
   643,318 : 1,374,984 = 1,374,984 : x
2. Step 2: Convert to fraction form
   643,318/1,374,984 = 1,374,984/x
3. Step 3: Cross multiply
   643,318x = 1,374,984 × 1,374,984
4. Step 4: Simplify right side
   643,318x = 1,890,581,000,256
5. Step 5: Solve for x
   x = 1,890,581,000,256/643,318
6. Step 6: Final answer
   x = 2,938,796.99