Finding the Third Proportional to 78,469.50 and 171,519

Step by Step Solution

1. Step 1: Write the proportion equation
   78,469.50 : 171,519 = 171,519 : x
2. Step 2: Convert to fraction form
   78,469.50/171,519 = 171,519/x
3. Step 3: Cross multiply
   78,469.50x = 171,519 × 171,519
4. Step 4: Simplify right side
   78,469.50x = 29,418,767,361
5. Step 5: Solve for x
   x = 29,418,767,361/78,469.50
6. Step 6: Final answer
   x = 374,907.03