Finding the Third Proportional to 638,144 and 1,381,952

Step by Step Solution

1. Step 1: Write the proportion equation
   638,144 : 1,381,952 = 1,381,952 : x
2. Step 2: Convert to fraction form
   638,144/1,381,952 = 1,381,952/x
3. Step 3: Cross multiply
   638,144x = 1,381,952 × 1,381,952
4. Step 4: Simplify right side
   638,144x = 1,909,791,330,304
5. Step 5: Solve for x
   x = 1,909,791,330,304/638,144
6. Step 6: Final answer
   x = 2,992,727.86