Finding the Third Proportional to 108,430 and 172,500

Step by Step Solution

1. Step 1: Write the proportion equation
   108,430 : 172,500 = 172,500 : x
2. Step 2: Convert to fraction form
   108,430/172,500 = 172,500/x
3. Step 3: Cross multiply
   108,430x = 172,500 × 172,500
4. Step 4: Simplify right side
   108,430x = 29,756,250,000
5. Step 5: Solve for x
   x = 29,756,250,000/108,430
6. Step 6: Final answer
   x = 274,428.20