Finding the Third Proportional to 711,264 and 1,678,920

Step by Step Solution

1. Step 1: Write the proportion equation
   711,264 : 1,678,920 = 1,678,920 : x
2. Step 2: Convert to fraction form
   711,264/1,678,920 = 1,678,920/x
3. Step 3: Cross multiply
   711,264x = 1,678,920 × 1,678,920
4. Step 4: Simplify right side
   711,264x = 2,818,772,366,400
5. Step 5: Solve for x
   x = 2,818,772,366,400/711,264
6. Step 6: Final answer
   x = 3,963,046.59