Finding the Third Proportional to 360,780 and 783,039.25

Step by Step Solution

1. Step 1: Write the proportion equation
   360,780 : 783,039.25 = 783,039.25 : x
2. Step 2: Convert to fraction form
   360,780/783,039.25 = 783,039.25/x
3. Step 3: Cross multiply
   360,780x = 783,039.25 × 783,039.25
4. Step 4: Simplify right side
   360,780x = 613,150,467,040.56
5. Step 5: Solve for x
   x = 613,150,467,040.56/360,780
6. Step 6: Final answer
   x = 1,699,513.46