Finding the Third Proportional to 348,330 and 521,144

Step by Step Solution

1. Step 1: Write the proportion equation
   348,330 : 521,144 = 521,144 : x
2. Step 2: Convert to fraction form
   348,330/521,144 = 521,144/x
3. Step 3: Cross multiply
   348,330x = 521,144 × 521,144
4. Step 4: Simplify right side
   348,330x = 271,591,068,736
5. Step 5: Solve for x
   x = 271,591,068,736/348,330
6. Step 6: Final answer
   x = 779,694.74