Finding the Third Proportional to 831,600 and 1,287,144

Step by Step Solution

1. Step 1: Write the proportion equation
   831,600 : 1,287,144 = 1,287,144 : x
2. Step 2: Convert to fraction form
   831,600/1,287,144 = 1,287,144/x
3. Step 3: Cross multiply
   831,600x = 1,287,144 × 1,287,144
4. Step 4: Simplify right side
   831,600x = 1,656,739,676,736
5. Step 5: Solve for x
   x = 1,656,739,676,736/831,600
6. Step 6: Final answer
   x = 1,992,231.45