Finding the Third Proportional to 200,060 and 309,676

Step by Step Solution

1. Step 1: Write the proportion equation
   200,060 : 309,676 = 309,676 : x
2. Step 2: Convert to fraction form
   200,060/309,676 = 309,676/x
3. Step 3: Cross multiply
   200,060x = 309,676 × 309,676
4. Step 4: Simplify right side
   200,060x = 95,899,224,976
5. Step 5: Solve for x
   x = 95,899,224,976/200,060
6. Step 6: Final answer
   x = 479,352.32