Finding the Third Proportional to 1,088,169 and 1,690,638

Step by Step Solution

1. Step 1: Write the proportion equation
   1,088,169 : 1,690,638 = 1,690,638 : x
2. Step 2: Convert to fraction form
   1,088,169/1,690,638 = 1,690,638/x
3. Step 3: Cross multiply
   1,088,169x = 1,690,638 × 1,690,638
4. Step 4: Simplify right side
   1,088,169x = 2,858,256,847,044
5. Step 5: Solve for x
   x = 2,858,256,847,044/1,088,169
6. Step 6: Final answer
   x = 2,626,666.31