Finding the Third Proportional to 609,720 and 905,736.38

Step by Step Solution

1. Step 1: Write the proportion equation
   609,720 : 905,736.38 = 905,736.38 : x
2. Step 2: Convert to fraction form
   609,720/905,736.38 = 905,736.38/x
3. Step 3: Cross multiply
   609,720x = 905,736.38 × 905,736.38
4. Step 4: Simplify right side
   609,720x = 820,358,380,998.14
5. Step 5: Solve for x
   x = 820,358,380,998.14/609,720
6. Step 6: Final answer
   x = 1,345,467.40