Finding the Third Proportional to 857,136 and 1,281,495

Step by Step Solution

1. Step 1: Write the proportion equation
   857,136 : 1,281,495 = 1,281,495 : x
2. Step 2: Convert to fraction form
   857,136/1,281,495 = 1,281,495/x
3. Step 3: Cross multiply
   857,136x = 1,281,495 × 1,281,495
4. Step 4: Simplify right side
   857,136x = 1,642,229,435,025
5. Step 5: Solve for x
   x = 1,642,229,435,025/857,136
6. Step 6: Final answer
   x = 1,915,949.67