Finding the Third Proportional to 780,243 and 1,671,078

Step by Step Solution

1. Step 1: Write the proportion equation
   780,243 : 1,671,078 = 1,671,078 : x
2. Step 2: Convert to fraction form
   780,243/1,671,078 = 1,671,078/x
3. Step 3: Cross multiply
   780,243x = 1,671,078 × 1,671,078
4. Step 4: Simplify right side
   780,243x = 2,792,501,682,084
5. Step 5: Solve for x
   x = 2,792,501,682,084/780,243
6. Step 6: Final answer
   x = 3,579,015.36