Finding the Third Proportional to 551,912 and 1,207,144

Step by Step Solution

1. Step 1: Write the proportion equation
   551,912 : 1,207,144 = 1,207,144 : x
2. Step 2: Convert to fraction form
   551,912/1,207,144 = 1,207,144/x
3. Step 3: Cross multiply
   551,912x = 1,207,144 × 1,207,144
4. Step 4: Simplify right side
   551,912x = 1,457,196,636,736
5. Step 5: Solve for x
   x = 1,457,196,636,736/551,912
6. Step 6: Final answer
   x = 2,640,269.89