Finding the Third Proportional to 644,650 and 1,366,138

Step by Step Solution

1. Step 1: Write the proportion equation
   644,650 : 1,366,138 = 1,366,138 : x
2. Step 2: Convert to fraction form
   644,650/1,366,138 = 1,366,138/x
3. Step 3: Cross multiply
   644,650x = 1,366,138 × 1,366,138
4. Step 4: Simplify right side
   644,650x = 1,866,333,035,044
5. Step 5: Solve for x
   x = 1,866,333,035,044/644,650
6. Step 6: Final answer
   x = 2,895,110.58