Finding the Third Proportional to 349,111.69 and 815,860.69

Step by Step Solution

1. Step 1: Write the proportion equation
   349,111.69 : 815,860.69 = 815,860.69 : x
2. Step 2: Convert to fraction form
   349,111.69/815,860.69 = 815,860.69/x
3. Step 3: Cross multiply
   349,111.69x = 815,860.69 × 815,860.69
4. Step 4: Simplify right side
   349,111.69x = 665,628,661,407.97
5. Step 5: Solve for x
   x = 665,628,661,407.97/349,111.69
6. Step 6: Final answer
   x = 1,906,635.28