Finding the Third Proportional to 605,402 and 1,317,215

Step by Step Solution

1. Step 1: Write the proportion equation
   605,402 : 1,317,215 = 1,317,215 : x
2. Step 2: Convert to fraction form
   605,402/1,317,215 = 1,317,215/x
3. Step 3: Cross multiply
   605,402x = 1,317,215 × 1,317,215
4. Step 4: Simplify right side
   605,402x = 1,735,055,356,225
5. Step 5: Solve for x
   x = 1,735,055,356,225/605,402
6. Step 6: Final answer
   x = 2,865,955.77