Finding the Third Proportional to 777,072 and 1,690,872

Step by Step Solution

1. Step 1: Write the proportion equation
   777,072 : 1,690,872 = 1,690,872 : x
2. Step 2: Convert to fraction form
   777,072/1,690,872 = 1,690,872/x
3. Step 3: Cross multiply
   777,072x = 1,690,872 × 1,690,872
4. Step 4: Simplify right side
   777,072x = 2,859,048,120,384
5. Step 5: Solve for x
   x = 2,859,048,120,384/777,072
6. Step 6: Final answer
   x = 3,679,257.68