Finding the Third Proportional to 685,358 and 1,485,124

Step by Step Solution

1. Step 1: Write the proportion equation
   685,358 : 1,485,124 = 1,485,124 : x
2. Step 2: Convert to fraction form
   685,358/1,485,124 = 1,485,124/x
3. Step 3: Cross multiply
   685,358x = 1,485,124 × 1,485,124
4. Step 4: Simplify right side
   685,358x = 2,205,593,295,376
5. Step 5: Solve for x
   x = 2,205,593,295,376/685,358
6. Step 6: Final answer
   x = 3,218,162.33