Finding the Third Proportional to 78,717 and 169,870.50

Step by Step Solution

1. Step 1: Write the proportion equation
   78,717 : 169,870.50 = 169,870.50 : x
2. Step 2: Convert to fraction form
   78,717/169,870.50 = 169,870.50/x
3. Step 3: Cross multiply
   78,717x = 169,870.50 × 169,870.50
4. Step 4: Simplify right side
   78,717x = 28,855,986,770.25
5. Step 5: Solve for x
   x = 28,855,986,770.25/78,717
6. Step 6: Final answer
   x = 366,578.84