Finding the Third Proportional to 151,606.69 and 321,696.56

Step by Step Solution

1. Step 1: Write the proportion equation
   151,606.69 : 321,696.56 = 321,696.56 : x
2. Step 2: Convert to fraction form
   151,606.69/321,696.56 = 321,696.56/x
3. Step 3: Cross multiply
   151,606.69x = 321,696.56 × 321,696.56
4. Step 4: Simplify right side
   151,606.69x = 103,488,678,324.32
5. Step 5: Solve for x
   x = 103,488,678,324.32/151,606.69
6. Step 6: Final answer
   x = 682,612.88