Finding the Third Proportional to 309,610.69 and 435,997.69

Step by Step Solution

1. Step 1: Write the proportion equation
   309,610.69 : 435,997.69 = 435,997.69 : x
2. Step 2: Convert to fraction form
   309,610.69/435,997.69 = 435,997.69/x
3. Step 3: Cross multiply
   309,610.69x = 435,997.69 × 435,997.69
4. Step 4: Simplify right side
   309,610.69x = 190,093,983,505.35
5. Step 5: Solve for x
   x = 190,093,983,505.35/309,610.69
6. Step 6: Final answer
   x = 613,977.46