Finding the Third Proportional to 210,789 and 456,849

Step by Step Solution

1. Step 1: Write the proportion equation
   210,789 : 456,849 = 456,849 : x
2. Step 2: Convert to fraction form
   210,789/456,849 = 456,849/x
3. Step 3: Cross multiply
   210,789x = 456,849 × 456,849
4. Step 4: Simplify right side
   210,789x = 208,711,008,801
5. Step 5: Solve for x
   x = 208,711,008,801/210,789
6. Step 6: Final answer
   x = 990,141.84