Finding the Third Proportional to 687,644 and 1,051,230

Step by Step Solution

1. Step 1: Write the proportion equation
   687,644 : 1,051,230 = 1,051,230 : x
2. Step 2: Convert to fraction form
   687,644/1,051,230 = 1,051,230/x
3. Step 3: Cross multiply
   687,644x = 1,051,230 × 1,051,230
4. Step 4: Simplify right side
   687,644x = 1,105,084,512,900
5. Step 5: Solve for x
   x = 1,105,084,512,900/687,644
6. Step 6: Final answer
   x = 1,607,059.05