Finding the Third Proportional to 685,354 and 1,485,118

Step by Step Solution

1. Step 1: Write the proportion equation
   685,354 : 1,485,118 = 1,485,118 : x
2. Step 2: Convert to fraction form
   685,354/1,485,118 = 1,485,118/x
3. Step 3: Cross multiply
   685,354x = 1,485,118 × 1,485,118
4. Step 4: Simplify right side
   685,354x = 2,205,575,473,924
5. Step 5: Solve for x
   x = 2,205,575,473,924/685,354
6. Step 6: Final answer
   x = 3,218,155.11