Finding the Third Proportional to 687,278 and 1,010,320

Step by Step Solution

1. Step 1: Write the proportion equation
   687,278 : 1,010,320 = 1,010,320 : x
2. Step 2: Convert to fraction form
   687,278/1,010,320 = 1,010,320/x
3. Step 3: Cross multiply
   687,278x = 1,010,320 × 1,010,320
4. Step 4: Simplify right side
   687,278x = 1,020,746,502,400
5. Step 5: Solve for x
   x = 1,020,746,502,400/687,278
6. Step 6: Final answer
   x = 1,485,201.77