Finding the Third Proportional to 685,364 and 1,485,140

Step by Step Solution

1. Step 1: Write the proportion equation
   685,364 : 1,485,140 = 1,485,140 : x
2. Step 2: Convert to fraction form
   685,364/1,485,140 = 1,485,140/x
3. Step 3: Cross multiply
   685,364x = 1,485,140 × 1,485,140
4. Step 4: Simplify right side
   685,364x = 2,205,640,819,600
5. Step 5: Solve for x
   x = 2,205,640,819,600/685,364
6. Step 6: Final answer
   x = 3,218,203.49