Finding the Third Proportional to 89,430 and 189,519

Step by Step Solution

1. Step 1: Write the proportion equation
   89,430 : 189,519 = 189,519 : x
2. Step 2: Convert to fraction form
   89,430/189,519 = 189,519/x
3. Step 3: Cross multiply
   89,430x = 189,519 × 189,519
4. Step 4: Simplify right side
   89,430x = 35,917,451,361
5. Step 5: Solve for x
   x = 35,917,451,361/89,430
6. Step 6: Final answer
   x = 401,626.43