Finding the Third Proportional to 684,668 and 1,390,072

Step by Step Solution

1. Step 1: Write the proportion equation
   684,668 : 1,390,072 = 1,390,072 : x
2. Step 2: Convert to fraction form
   684,668/1,390,072 = 1,390,072/x
3. Step 3: Cross multiply
   684,668x = 1,390,072 × 1,390,072
4. Step 4: Simplify right side
   684,668x = 1,932,300,165,184
5. Step 5: Solve for x
   x = 1,932,300,165,184/684,668
6. Step 6: Final answer
   x = 2,822,244.01