Finding the Third Proportional to 622,138 and 1,285,748

Step by Step Solution

1. Step 1: Write the proportion equation
   622,138 : 1,285,748 = 1,285,748 : x
2. Step 2: Convert to fraction form
   622,138/1,285,748 = 1,285,748/x
3. Step 3: Cross multiply
   622,138x = 1,285,748 × 1,285,748
4. Step 4: Simplify right side
   622,138x = 1,653,147,919,504
5. Step 5: Solve for x
   x = 1,653,147,919,504/622,138
6. Step 6: Final answer
   x = 2,657,204.54