Finding the Third Proportional to 80,217 and 172,870.50

Step by Step Solution

1. Step 1: Write the proportion equation
   80,217 : 172,870.50 = 172,870.50 : x
2. Step 2: Convert to fraction form
   80,217/172,870.50 = 172,870.50/x
3. Step 3: Cross multiply
   80,217x = 172,870.50 × 172,870.50
4. Step 4: Simplify right side
   80,217x = 29,884,209,770.25
5. Step 5: Solve for x
   x = 29,884,209,770.25/80,217
6. Step 6: Final answer
   x = 372,542.10