Finding the Third Proportional to 151,206 and 321,528

Step by Step Solution

1. Step 1: Write the proportion equation
   151,206 : 321,528 = 321,528 : x
2. Step 2: Convert to fraction form
   151,206/321,528 = 321,528/x
3. Step 3: Cross multiply
   151,206x = 321,528 × 321,528
4. Step 4: Simplify right side
   151,206x = 103,380,254,784
5. Step 5: Solve for x
   x = 103,380,254,784/151,206
6. Step 6: Final answer
   x = 683,704.71