Finding the Third Proportional to 685,398 and 1,485,090

Step by Step Solution

1. Step 1: Write the proportion equation
   685,398 : 1,485,090 = 1,485,090 : x
2. Step 2: Convert to fraction form
   685,398/1,485,090 = 1,485,090/x
3. Step 3: Cross multiply
   685,398x = 1,485,090 × 1,485,090
4. Step 4: Simplify right side
   685,398x = 2,205,492,308,100
5. Step 5: Solve for x
   x = 2,205,492,308,100/685,398
6. Step 6: Final answer
   x = 3,217,827.17