Finding the Third Proportional to 687,633 and 1,051,215

Step by Step Solution

1. Step 1: Write the proportion equation
   687,633 : 1,051,215 = 1,051,215 : x
2. Step 2: Convert to fraction form
   687,633/1,051,215 = 1,051,215/x
3. Step 3: Cross multiply
   687,633x = 1,051,215 × 1,051,215
4. Step 4: Simplify right side
   687,633x = 1,105,052,976,225
5. Step 5: Solve for x
   x = 1,105,052,976,225/687,633
6. Step 6: Final answer
   x = 1,607,038.89