Finding the Third Proportional to 873,642 and 1,868,728

Step by Step Solution

1. Step 1: Write the proportion equation
   873,642 : 1,868,728 = 1,868,728 : x
2. Step 2: Convert to fraction form
   873,642/1,868,728 = 1,868,728/x
3. Step 3: Cross multiply
   873,642x = 1,868,728 × 1,868,728
4. Step 4: Simplify right side
   873,642x = 3,492,144,337,984
5. Step 5: Solve for x
   x = 3,492,144,337,984/873,642
6. Step 6: Final answer
   x = 3,997,225.79