Finding the Third Proportional to 168,361.50 and 258,768

Step by Step Solution

1. Step 1: Write the proportion equation
   168,361.50 : 258,768 = 258,768 : x
2. Step 2: Convert to fraction form
   168,361.50/258,768 = 258,768/x
3. Step 3: Cross multiply
   168,361.50x = 258,768 × 258,768
4. Step 4: Simplify right side
   168,361.50x = 66,960,877,824
5. Step 5: Solve for x
   x = 66,960,877,824/168,361.50
6. Step 6: Final answer
   x = 397,720.84