Finding the Third Proportional to 1,061,640 and 1,688,634

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061,640 : 1,688,634 = 1,688,634 : x
2. Step 2: Convert to fraction form
   1,061,640/1,688,634 = 1,688,634/x
3. Step 3: Cross multiply
   1,061,640x = 1,688,634 × 1,688,634
4. Step 4: Simplify right side
   1,061,640x = 2,851,484,785,956
5. Step 5: Solve for x
   x = 2,851,484,785,956/1,061,640
6. Step 6: Final answer
   x = 2,685,924.41