Finding the Third Proportional to 670,228 and 1,387,112

Step by Step Solution

1. Step 1: Write the proportion equation
   670,228 : 1,387,112 = 1,387,112 : x
2. Step 2: Convert to fraction form
   670,228/1,387,112 = 1,387,112/x
3. Step 3: Cross multiply
   670,228x = 1,387,112 × 1,387,112
4. Step 4: Simplify right side
   670,228x = 1,924,079,700,544
5. Step 5: Solve for x
   x = 1,924,079,700,544/670,228
6. Step 6: Final answer
   x = 2,870,783.82