Finding the Third Proportional to 197,300 and 309,172

Step by Step Solution

1. Step 1: Write the proportion equation
   197,300 : 309,172 = 309,172 : x
2. Step 2: Convert to fraction form
   197,300/309,172 = 309,172/x
3. Step 3: Cross multiply
   197,300x = 309,172 × 309,172
4. Step 4: Simplify right side
   197,300x = 95,587,325,584
5. Step 5: Solve for x
   x = 95,587,325,584/197,300
6. Step 6: Final answer
   x = 484,477.07