Finding the Third Proportional to 685,432 and 1,485,272

Step by Step Solution

1. Step 1: Write the proportion equation
   685,432 : 1,485,272 = 1,485,272 : x
2. Step 2: Convert to fraction form
   685,432/1,485,272 = 1,485,272/x
3. Step 3: Cross multiply
   685,432x = 1,485,272 × 1,485,272
4. Step 4: Simplify right side
   685,432x = 2,206,032,913,984
5. Step 5: Solve for x
   x = 2,206,032,913,984/685,432
6. Step 6: Final answer
   x = 3,218,456.26