Finding the Third Proportional to 391,610 and 605,856

Step by Step Solution

1. Step 1: Write the proportion equation
   391,610 : 605,856 = 605,856 : x
2. Step 2: Convert to fraction form
   391,610/605,856 = 605,856/x
3. Step 3: Cross multiply
   391,610x = 605,856 × 605,856
4. Step 4: Simplify right side
   391,610x = 367,061,492,736
5. Step 5: Solve for x
   x = 367,061,492,736/391,610
6. Step 6: Final answer
   x = 937,313.89