Finding the Third Proportional to 1,061,642 and 1,688,637

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061,642 : 1,688,637 = 1,688,637 : x
2. Step 2: Convert to fraction form
   1,061,642/1,688,637 = 1,688,637/x
3. Step 3: Cross multiply
   1,061,642x = 1,688,637 × 1,688,637
4. Step 4: Simplify right side
   1,061,642x = 2,851,494,917,769
5. Step 5: Solve for x
   x = 2,851,494,917,769/1,061,642
6. Step 6: Final answer
   x = 2,685,928.89