Finding the Third Proportional to 638,166 and 1,381,996

Step by Step Solution

1. Step 1: Write the proportion equation
   638,166 : 1,381,996 = 1,381,996 : x
2. Step 2: Convert to fraction form
   638,166/1,381,996 = 1,381,996/x
3. Step 3: Cross multiply
   638,166x = 1,381,996 × 1,381,996
4. Step 4: Simplify right side
   638,166x = 1,909,912,944,016
5. Step 5: Solve for x
   x = 1,909,912,944,016/638,166
6. Step 6: Final answer
   x = 2,992,815.26