Finding the Third Proportional to 1,061,696 and 1,688,721

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061,696 : 1,688,721 = 1,688,721 : x
2. Step 2: Convert to fraction form
   1,061,696/1,688,721 = 1,688,721/x
3. Step 3: Cross multiply
   1,061,696x = 1,688,721 × 1,688,721
4. Step 4: Simplify right side
   1,061,696x = 2,851,778,615,841
5. Step 5: Solve for x
   x = 2,851,778,615,841/1,061,696
6. Step 6: Final answer
   x = 2,686,059.49