Finding the Third Proportional to 687,233 and 1,421,608

Step by Step Solution

1. Step 1: Write the proportion equation
   687,233 : 1,421,608 = 1,421,608 : x
2. Step 2: Convert to fraction form
   687,233/1,421,608 = 1,421,608/x
3. Step 3: Cross multiply
   687,233x = 1,421,608 × 1,421,608
4. Step 4: Simplify right side
   687,233x = 2,020,969,305,664
5. Step 5: Solve for x
   x = 2,020,969,305,664/687,233
6. Step 6: Final answer
   x = 2,940,733.79