Finding the Third Proportional to 636,520 and 1,391,144

Step by Step Solution

1. Step 1: Write the proportion equation
   636,520 : 1,391,144 = 1,391,144 : x
2. Step 2: Convert to fraction form
   636,520/1,391,144 = 1,391,144/x
3. Step 3: Cross multiply
   636,520x = 1,391,144 × 1,391,144
4. Step 4: Simplify right side
   636,520x = 1,935,281,628,736
5. Step 5: Solve for x
   x = 1,935,281,628,736/636,520
6. Step 6: Final answer
   x = 3,040,409.77