Finding the Third Proportional to 636,258 and 1,372,143

Step by Step Solution

1. Step 1: Write the proportion equation
   636,258 : 1,372,143 = 1,372,143 : x
2. Step 2: Convert to fraction form
   636,258/1,372,143 = 1,372,143/x
3. Step 3: Cross multiply
   636,258x = 1,372,143 × 1,372,143
4. Step 4: Simplify right side
   636,258x = 1,882,776,412,449
5. Step 5: Solve for x
   x = 1,882,776,412,449/636,258
6. Step 6: Final answer
   x = 2,959,139.87