Finding the Third Proportional to 356,558 and 783,091

Step by Step Solution

1. Step 1: Write the proportion equation
   356,558 : 783,091 = 783,091 : x
2. Step 2: Convert to fraction form
   356,558/783,091 = 783,091/x
3. Step 3: Cross multiply
   356,558x = 783,091 × 783,091
4. Step 4: Simplify right side
   356,558x = 613,231,514,281
5. Step 5: Solve for x
   x = 613,231,514,281/356,558
6. Step 6: Final answer
   x = 1,719,864.69