Finding the Third Proportional to 831,860 and 1,287,512

Step by Step Solution

1. Step 1: Write the proportion equation
   831,860 : 1,287,512 = 1,287,512 : x
2. Step 2: Convert to fraction form
   831,860/1,287,512 = 1,287,512/x
3. Step 3: Cross multiply
   831,860x = 1,287,512 × 1,287,512
4. Step 4: Simplify right side
   831,860x = 1,657,687,150,144
5. Step 5: Solve for x
   x = 1,657,687,150,144/831,860
6. Step 6: Final answer
   x = 1,992,747.76